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Particles and Nuclei International Conference 2017 (PANIC2017)

Asia/Shanghai
The Auditorium (Plenary Session) (China National Convention Center)

The Auditorium (Plenary Session)

China National Convention Center

No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
Description

Welcome to the indico page of the Particles and Nuclei International Conference 2017 (PANIC2017)

PANIC2017 will be held in Beijing from Sept. 1 to 5, 2017 in China National Converntion Center. This conference is the 21st in the series of triennial conferences which bring together the Particle and Nuclear Physics communities.

PANIC2017 will consist of plenary talks and a number of parallel sessions. The scientific program addresses a broad range of topics at the interface between particle, nuclear and astrophysics. Special emphasis will be devoted to recent discoveries and results.

The conference will last for 5 days, of them, 5 mornings are for plenary sessions, 3 afternoons for parallel sessions (including one session, dedicated to the poster session).

 

Participants
  • Abner Soffer
  • Adam Gibson
  • Adlene Hicheur
  • Alexander Austregesilo
  • Alfredo Valcarce
  • Ali Nawaz
  • ameer mukhtar
  • AMIT PATHAK
  • Andrea Dell'Acqua
  • Andrea Ventura
  • Andrew Weisenberger
  • Anna Lupato
  • Antoine Marzin
  • Ao Xu
  • Arely Cortes Gonzalez
  • Arthur Olin
  • Asadolah Tavakolinezhad
  • Attilio Andreazza
  • Bao-Xi Sun
  • Beijiang LIU
  • Bing-Song Zou
  • Caitriana Nicholson
  • Chengping Shen
  • Chengqun Pang
  • Chensheng Zhou
  • CHI YANG
  • Christoph Hanhart
  • Christoph Wiesinger
  • Christopher Thomas
  • Cong Geng
  • Daniel Mühlheim
  • David Petyt
  • Dawn Williams
  • Dayong Wang
  • Domenico Colella
  • Eberhard WIDMANN
  • Enrico Fragiacomo
  • Enrico Tassi
  • Erica Smith
  • Fabrizio Bianchi
  • fan wang
  • Federico Meloni
  • Fei Gao
  • Fei Huang
  • Feng-Kun Guo
  • Fengwangdong Zhang
  • Frederick Bordry
  • Gabriele Piperno
  • Gang LI
  • Gao Jian-HUa
  • Germano Bonomi
  • Giulio Mezzadri
  • Gong-Ming Yu
  • Gyan Shrestha
  • Hai-Bo Li
  • Haiwang Yu
  • Hao Liang
  • Hao Ma
  • Hao Qian
  • Helena Santos
  • Henryk Witala
  • Hiroaki Natori
  • Hirokazu Tamura
  • Hua-Xing Chen
  • Huirong Qi
  • Hulya Atmacan
  • Igor Alekseev
  • Isabel Lopes
  • Jake Bennett
  • Jana Schaarschmidt
  • Javier Llorente Merino
  • Javier Vijande
  • Jianbin Jiao
  • Jiayin SUN
  • Jie Zhao
  • Joao Guimaraes da Costa
  • Johann Marton
  • Johanna Stachel
  • Juan Pedro Ochoa Ricoux
  • Jun Cao
  • Jun He
  • Junhao YIN
  • Junpei Shirai
  • Junya SASAKI
  • Karol Krizka
  • Katharine Leney
  • Kirill Prokofiev
  • Kristian Damlund Gregersen
  • Kunlin Ran
  • Lars Eklund
  • Laura Collica
  • Lei Li
  • Lia Lavezzi
  • Liang HAN
  • Liang Zheng
  • Liangwen Chen
  • Liwei Wang
  • Longke Li
  • Lubos Bician
  • Luca Mastrolorenzo
  • Lucia Canonica
  • Luis Farina Busto
  • M. Ayub Faridi
  • M. Naeem Anwar
  • MAKGABUTLE KATLEGO DIPHUFA
  • Maojun Yan
  • Maosen ZHOU
  • Marco Destefanis
  • Marco Maggiora
  • Maria Moreno Llacer
  • Markus Cristinziani
  • Martin Heck
  • Masahiro Kuze
  • Masayuki Niiyama
  • Michael Hasinoff
  • MICHAEL NANA AGYEKUM
  • Michael Ramsey-Musolf
  • Michele Corvino
  • Mikhail Bashkanov
  • Mikihiko Nakao
  • Mile Stankovic
  • Moritz Backes
  • Murli Verma
  • MUSTAFA KAMISCIOGLU
  • Nathaniel Bowden
  • Nello Bruscino
  • Nina Shevchenko
  • Nurgissa Myrzakulov
  • PAN Qian
  • Paolo Meridiani
  • Pau Novella Garijo
  • pengfei zhuang
  • Pengnian Shen
  • Philippe CHOMAZ
  • Qi Yan
  • Qiang Li
  • Qing QIN
  • Ralf Kaiser
  • Renu Bala
  • RICHARD ANTWI BOASIAKO
  • Roberto Mussa
  • Roger Carlini
  • Roman Skibinski
  • Rong-Gang Ping
  • Rosanna Depalo
  • ROTIMI PETER DADA
  • Samuel Owusu
  • Sebastian Tapia Araya
  • Sergey Barsuk
  • Shenghui Zhang
  • Shilpi Jain
  • Shin MICHIZONO
  • Shoichiro NISHIMURA
  • Shoushan Zhang
  • Shuai Wang
  • Shuai Yang
  • Shuangshi Fang
  • Shun Zhou
  • Shuopin WEN
  • Shuyang Hu
  • Somnath Choudhury
  • Sourav Kundu
  • Stephan Paul
  • Stroth Joachim
  • Sun Yanjun
  • Syaefudin Jaelani
  • TAKASHI KOBAYASHI
  • TAO LUO
  • Tetyana Galatyuk
  • Thomas Gilliss
  • Tianhong Xing Tianhong
  • Tiesheng Dai
  • Tjonnie Li
  • Toru Sugitate
  • Valerie Lang
  • Varun Sharma
  • Victor HELAINE
  • Vincent Hedberg
  • Wojciech Krzemien
  • Wuming Luo
  • Xiang ZHOU
  • Xiangdong Ji
  • Xianguo Lu
  • Xiaochun He
  • Xiaohu Mo
  • Xiaolong Wang
  • Xiaoyan Shen
  • Xiaozhou Li
  • Xin Xiang
  • Xinchou Lou
  • Xingtao Huang
  • XINMIN ZHANG
  • Xiongfei Wang
  • Yang Liu
  • Yaoguang Wang
  • Yaping Wang
  • Yasuhiro Takemoto
  • Ye Chen
  • Ye Yuan
  • Yerlan Myrzakulov
  • Yi Wang
  • Yifang Wang
  • Yiming Li
  • Yinghui GUAN
  • Yingrui Hou
  • You Zhou
  • Yu Zhang
  • Yubing Dong
  • Yunfei Long
  • Zahra Ghalenovi
  • Zeren Simon Wang
  • Zeyuan Yu
  • Zhaoxia Meng
  • Zhen Liu
  • Zhenjie Li
  • Zhenyu ZHANG
  • Zhi Wu
  • Zhi-zhong Xing
  • Zhijun LIANG
  • Zongye Zhang
  • 婧 陈
  • 汉杰 蔡
  • 王妹 查
  • 航 尹
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 1
        Openning
        Speaker: Prof. Yifang WANG Yifang (IHEP)
        Slides
      • 2
        Flavor physics: CKM
        Speaker: Mikihiko Nakao (KEK)
        Slides
      • 3
        Flavor Physics: Rare B decays
        Speaker: Dr Lars Eklund (University of Glasgow)
        Slides
      • 4
        Photo
    • 10:30 AM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 5
        Neutrino physics: Reactor-based
        Speaker: Juan Pedro Ochoa Ricoux (Pontificia Universidad Católica de Chile)
        Slides
      • 6
        Neutrino physics: Accelerator-based
        Speaker: Prof. Takashi Kobayashi (KEK)
        Slides
      • 7
        Neutrino physics: Double-beta decay
        Speaker: Prof. Junpei Shirai (Tohoku U.)
        Slides
    • 12:30 PM
      Lunch Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Energy frontier physics beyond the standard model 303B

      303B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 8
        Searches for New Phenomena with the ATLAS detector
        Speaker: Karol KRIZKA (Berkeley LBNL)
        Slides
      • 9
        Physics at HL-LHC with the ATLAS detector upgrade
        Speaker: Andrea DELL'ACQUA (CERN)
        Slides
      • 10
        Dark Matter searches with the ATLAS Detector
        The presence of a non-baryonic dark matter component in the Universe is inferred from the observation of its gravitational interaction. If dark matter interacts weakly with the Standard Model it would be produced at the LHC, escaping the detector and leaving a large missing transverse momentum as their signature. The ATLAS detector has developed a broad and systematic search program for dark matter production in LHC collisions. The results of these searches on the first 13 TeV data, their interpretation, and the design and possible evolution of the search program will be presented.
        Speaker: Arely CORTES-GONZALEZ (CERN)
        Slides
      • 3:40 PM
        Coffee Break
    • Flavor physics - CKM and beyond 302B

      302B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 11
        Production of b and c hadrons with the ATLAS detector
        Speaker: Jing CHEN (Hefei)
        Slides
      • 12
        CP Violation sensitivity at the Belle II Experiment
        The measurement of the time-dependent CP violation parameters for B-meson decays is crucial for tightening the constraints on the unitarity triangle and for the search of new physics beyond the Standard Model. A clean environment for the study of B decay channels is provided by B-factories. With a design luminosity of 8 · 10^35 cm^−2s^−1, leading ultimately to an integrated luminosity beyond 50 ab^−1, the new B-factory SuperKEKB will exceed the record instantaneous luminosity of its predecessor KEKB by a factor of 40. The new Belle II detector will exploit the expected high statistics data sample thanks to a major upgrade of the tracking system, including a novel pixel vertex detector in its innermost part. Additionally, the detector capabilities will be complemented by substantial improvements in the reconstruction software. We develop a strategy for CP violation analysis in order to maximally exploit the new data set and to characterize the sensitivity of Belle II for various benchmark B decay channels.
        Speaker: Tao Luo
        Slides
      • 13
        Mixing and CPV in charm hadrons at LHCb
        LHCb continues to expand its world-leading sample of charmed hadrons collected during LHC’s Run 1 (2010-2012) and Run 2 (2015- present). This sample is yielding some of the most stringent tests of the Standard Model understanding of charm physics. This includes precise measurements of the neutral D-meson mixing parameters and some of the most sensitive searches for direct and indirect CP violation in charm interactions. The latest LHCb measurements from these research areas are presented.
        Speaker: Dr Wojciech Krzemien (National Centre for Nuclear Research)
        Slides
      • 14
        CP violation in b hadrons at LHCb
        The latest results of CP violation measurements in b hadrons at LHCb are presented. This includes recent results of time-integrated and time-dependent measurements of B mesons, such as measurements of the CKM angles gamma and phi_s, as well as measurements of b baryons.
        Speaker: Adlene Hicheur (U)
        Slides
    • Hadron spectroscopy and exotics 303A

      303A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 15
        XYZ states at BESIII
        The BESIII Experiment at the Beijing Electron Positron Collider (BEPC2) has accumulated the world's largest samples of e+e- collisions in the tau-charm region. Cross sections of e+e- --> pi+pi- psi(2S) above 4.0 GeV, and a charged structure has been observed in the pi psi(2S) mass spectrum. Cross sections of e+e- --> KKbar J/psi between 4189 and 4600 MeV. Compared with pi+ pi- J/psi, more complex structure in the line shape is observed. Quantum number J^P of Zc(3900) is determined to be 1^+ by partial wave analysis of e^+ e^- -> pi^+ pi^- J/psi at 4.23 and 4.26 GeV. Observation of e+e- -> eta' Jpsi at center-of-mass energies between 4.190 and 4.600 GeV. Measurement of the e+e- -> pi+ pi- h_c cross section at BESIII, in addition to previous Y(4230), a new wider Y state has been observed. Precise measurement of the e+ e− -> pi+ pi- J/psi cross section at center-of-mass energies from 3.77 to 4.60 GeV, in addition to the previously found Y(4230), a new wider Y state has been observed.
        Speaker: Junhao Yin (IHEP)
        Slides
      • 16
        Exotic quarkonium-like states and spectroscopy at Belle
        We report the recent results on the measurement of charmonium-like and bottomonium-like resonances at Belle. The report includes the first observation of $Z_b(10610) \to B\bar{B}$ and $Z_b(10650) \to B\bar{B}^*$ and studies of bottomonium-like state using $\Upsilon(5S)$ and $\Upsilon(6S)$ data taken at Belle. We also report measurements of $B$ decays to charmonium and charmonium-like states.
        Speaker: Roberto Mussa (INFN/Torino)
        Slides
      • 17
        Heavy flavour spectroscopy at LHCb
        We report on the first observation of excited hadronic states in both the charm and beauty sector with special emphasis on the observation of five excited Omega_c states. Similar techniques are used to search the LHCb data for states observed in other datasets, such as the tetraquark state X(5568) whose evidence was reported by D0. Prospects for searches of exotic states in b-hadron decays exploiting Run2 LHCb data are also presented.
        Speaker: Ao XU (Tsinghua)
        Slides
      • 18
        Heavy quarks spectroscopy with the ATLAS detector
        Speaker: Tiesheng Dai (U)
        Slides
    • Hot and dense matter physics (QGP and heavy ion collision) 302A

      302A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 19
        Recent Highlights of PHENIX Results at RHIC
        Driven by the motivations of understanding the properties of the quark-gluon plasma (QGP) and the structure of nucleons, two major research programs, the Heavy-Ion program and Spin program, were established in the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) facility. RHIC can collide a large variety of nuclear species from p + p to U + U, and is currently the only collider that can produce polarized p + p collisions. In this talk we present highlights of recent measurements from PHENIX. For the Heavy-Ion program, we will discuss the latest results on particle collectivity and hard probes, in order to understand the bulk and fine structure of the QGP and to push the limit of QGP formation in small systems and at low energies. For the Spin program, we will present latest results on longitudinal and transverse spin effects in the nucleon.
        Speaker: Haiwang Yu (Peking University)
        Slides
      • 20
        Excess of $J/\psi$ yield at very low $p_{T}$ in Au+Au collisions at $\sqrt{s_{\text{NN}}}$ = 200 GeV and U+U collisions at $\sqrt{s_{\text{NN}}}$ = 193 GeV measured with the STAR experiment
        Suppression of J/ψ production in heavy-ion collisions due to color screening of quark and antiquark potential in the deconfined medium has been proposed as a signature of the QGP formation. Other mechanisms, such as the cold nuclear matter effects and J/ψ regeneration from charm quark-antiquark recombination in the medium, can contribute to the observed modification of the J/ψ production in heavy-ion collisions. Unexpectedly, a significant excess of the J/ψ yield at very low transverse momenta (pT< 0.3 GeV/c) was observed by the ALICE collaboration in peripheral Pb+Pb collisions at sNN‾‾‾‾√ = 2.76 TeV at forward-rapidity, which can not be explained by the aforementioned effects. It has been hypothesized that such J/ψ's are produced in the coherent photoproduction in Pb+Pb collisions at impact parameters smaller than twice the nuclear radius, which would be very challenging for the existing models developed to describe the coherent photoproduction in ultra-peripheral collisions. Measurements of J/ψ production at very low pT for different collision energies, collision systems, and collision geometries can shed new light on the origin of the excess.\ In this presentation we report the STAR measurements of J/ψ production at very low pT in Au+Au collisions at sNN‾‾‾‾√ = 200 GeV and U+U collisions at sNN‾‾‾‾√ = 193 GeV at mid-rapidity. Centrality and pT dependencies of J/ψ production cross sections and nuclear modification factors will be presented.
        Speaker: 王妹 查 (中国科学技术大学近代物理系)
        Slides
      • 21
        φ spin alignment w.r.t global angular momentum reconstructed with 1st order event plane
        The spin alignment of the φ-meson could be sensitive to different hadronization scenarios and the vorticity of the colliding system. We present the spin alignment measurements of φ-mesons produced at mid-rapidity with transverse momentum up to 5 GeV/c in STAR. The alignment is quantified by the diagonal spin density matrix elements ρ00 with respect to the normal of the 1st order event plane, which itself is reconstructed with the Zero Degree Calorimeter. The results will be presented as a function of the transverse momentum and collision centrality for the beam energies of 11.5, 19.6, 27, 39 and 200 GeV. The implications of our results will be discussed.
        Speaker: Chensheng Zhou (Shanghai Institute of Applied Physics)
        Slides
      • 22
        Chiral magnetic effect search in p+Au, d+Au and Au+Au collisions at RHIC
        Metastable domains of fluctuating topological charges can change the chirality of quarks and induce local parity violation in quantum chromodynamics. This can lead to observable charge separation along the direction of the strong magnetic field produced in relativistic heavy-ion collisions, a phenomenon called the chiral magnetic effect (CME). A major background source for CME measurements is the intrinsic particle correlations (such as resonances/jets decay) coupled with the azimuthal elliptical anisotropy v2. In heavy-ion collisions, the magnetic field direction and event plane azimuthal angle Ψ2 are correlated, thus the CME and the v2-induced background are entangled. In small system p+Au and d+Au collisions, the Ψ2 is mostly due to geometry fluctuations, and thus magnetic field direction and Ψ2 are uncorrelated. The correlation measurements in small system collisions with respect to Ψ2 are only sensitive to v2-induced background while any CME is averaged to zero. In this talk, we will present the STAR measurements of two-particle correlations with respect to Ψ2 in p+Au, d+Au and Au+Au collisions at sNN‾‾‾‾√ = 200 GeV. These results are analyzed as a function of particle multiplicity to shed light on the background contaminations of the CME measurements in heavy-ion collisions. The interpretation of these results in terms of CME and/or background may require improved analysis strategies such as the less background sensitive observables and/or upcoming data such as the planned isobar collisions at RHIC.
        Speaker: Jie Zhao (P)
        Slides
      • 23
        Low $p_{T}$ dielectron production in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and U+ U collisions at $\sqrt{s_{NN}}$ = 193 GeV at STAR
        Recently, a significant excess of J/ψ yield at very low transverse momenta (pT<0.3 GeV/c) was reported by the ALICE collaboration in peripheral Pb+Pb collisions at sNN‾‾‾‾√ = 2.76 TeV [1]. STAR collaboration also observed the similar behavior of J/ψ production in peripheral Au+Au collisions at sNN‾‾‾‾√ = 200 GeV and U+U collisions at sNN‾‾‾‾√ = 193 GeV. These observations may point to possibility of an additional process with the coherent photoproduction mechanism. It is also interesting to investigate the e+e− pair production in a wider invariant mass region (Mee<4 GeV/c2) at very low pT in heavy-ion collisions for different centrality bins in order to study the production mechanism. In this talk, we will present the centrality dependence of e+e− pair invariant mass spectra at very low pT (pT<0.15 GeV/c) in Au+Au collisions at sNN‾‾‾‾√ = 200 GeV and U+U collisions at sNN‾‾‾‾√ = 193 GeV. The pT differentials and t (−t≈p2T) distributions of two mass regions (0.4-0.76 and 1.2-2.6 GeV/c2) in most peripheral aforementioned heavy-ion collisions will be shown and compared with the same distributions in ultra-peripheral collisions. Physics implications will be discussed. [1] J. Adam et al. (ALICE Collaboration), Phys. Rev. Lett. 116, 222301 (2016).
        Speaker: Shuai Yang (Brookhaven National Laboratory)
        Slides
    • Neutrino physics 301A

      301A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 24
        Recent results from Daya Bay
        Utilizing the powerful reactors as anti-neutrino sources, and eight functionally identical underground detectors, the Daya Bay experiment has studied a wide range of topic of interest in neutrino physics. In this talk, I will report the latest measurement of oscillation parameters, and search for a light sterile neutrino, among others. A recent measurement of evolution of the reactor anti-neutrino flux and spectrum over multiple fuel cycles in 1230 days will also be presented. The measurement suggests a 7.8% overestimation of predicted anti-neutrino flux from 235U fission isotope, and indicates this isotope could be the primary contributor to the reactor antineutrino anomaly.
        Speaker: Dr Zeyuan Yu (中国科学院高能物理研究所)
        Slides
      • 25
        PROSPECT: A Precision Reactor Oscillation and Spectrum Experiment
        PROSPECT is a reactor antineutrino experiment whose primary goals are to probe short-baseline oscillations and perform a precise measurement of the U-235 reactor antineutrino spectrum. These goals demand close proximity to a compact research reactor core, posing detector design challenges such as tight space constraints, limited overburden and reactor-correlated backgrounds. Therefore, PROSPECT has designed a 4-ton segmented antineutrino detector using 6Li-loaded liquid scintillator that provides excellent background rejection, position resolution, and energy resolution. When deployed at the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory, PROSPECT will provide a model-independent oscillation measurement by comparing the observed antineutrino spectrum across a baseline range of 7-12m. The high resolution and high statistics energy spectrum measurement to be performed by PROSPECT of the U-235 HFIR core will provide insight into spectral anomaly recently observed in other antineutrino experiments at commercial power reactors. Here we describe the experimental program, detector design, and discovery potential of PROSPECT. LLNL-ABS-729829. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
        Speaker: Nathaniel Bowden (L)
        Slides
      • 26
        Background free search for neutrinoless double beta decay with GERDA Phase II
        An observation of neutrinoless double beta decay would allow to shed light onto the particle nature of neutrinos. GERDA (GERmanium Detector Array) aims to discover this process in a background-free search using 76Ge. Bare isotopically enriched high purity germanium detectors are operated in liquid argon. GERDA is located at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy and follows a staged approach. In Phase II 35.6 kg of enriched germanium detectors are operated since December 2015. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allowed to reduce the background index to the intended level of 10−3 cts/(keV⋅kg⋅yr). The talk will discuss the current status and latest results of the experiment.
        Speaker: Christoph Wiesinger (Technical University of Munich)
        Slides
      • 27
        More results from the OPERA experiment at the Gran Sasso underground Lab
        The OPERA experiment reached its main goal by proving the appearance of ντ in the CNGS νμ beam. A total sample of 5 candidates fulfilling the analysis defined in the proposal was detected with a S/B ratio of about ten allowing to reject the null hypothesis at 5.1 σ. The search has been extended to ντ-like interactions failing the kinematical analysis defined in the experiment proposal to obtain a statistically enhanced, lower purity, signal sample. One such interesting neutrino interaction with a double vertex topology with a high probability of being a ντ interaction with charm production is reported. Based on the enlarged data sample the estimation of Δm223 in appearance mode is presented. The search for νe interactions has been extended over the full data set with a more than twofold increase in statistics with respect to published data. The analysis of the νμ→νe channel is updated and the implications of the electron neutrino sample in the framework of the 3+1 sterile model is discussed. An analysis of νμ→ντ interactions in the framework of the sterile neutrino model has also been performed. Finally, the results of the analysis of the annual modulation of the cosmic muon rate is presented.
        Speaker: Mustafa KAMISCIOGLU (Middle East Technical University)
        Slides
      • 28
        Limits on heavy neutrinos at NA48 and NA62
        The NA62 experiment at CERN collected a large sample of charged kaon decays in flight with a minimum bias trigger in 2007. Upper limits on the rate of the charged kaon decay into a muon and a heavy neutral lepton (HNL) obtained from this data are reported for a range of HNL masses.
        Slides
    • Nuclear and particle astrophysics 305

      305

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 29
        Recent Results from IceCube
        The IceCube Neutrino Observatory is a cubic kilometer detector located at the geographic South Pole. IceCube was designed to detect high-energy neutrinos from cosmic sources, and the DeepCore extension of IceCube enables the study of atmospheric neutrino interactions down to energies of a few GeV. IceCube has detected a diffuse flux of neutrinos in the energy range from 100 TeV to several PeV, the properties of which are inconsistent with an atmospheric origin, and has also published competitive limits on atmospheric neutrino oscillation parameters and other neutrino properties. I will discuss the latest results from IceCube and discuss prospects for future upgrades and expansions of the detector.
        Speaker: Prof. Dawn Williams (University of Alabama)
        Slides
      • 30
        Recent Results from the MAJORANA DEMONSTRATOR
        The MAJORANA Collaboration has completed construction and is now operating an array of high purity Ge detectors searching for neutrinoless double-beta decay in 76Ge. The array, known as the MAJORANA DEMONSTRATOR, is comprised of 44 kg of Ge detectors (30 kg enriched to 88% in 76Ge) installed in an ultra-low background compact shield at the Sanford Underground Research Facility in Lead, South Dakota. The initial goals of the DEMONSTRATOR are to establish the required background and scalability of a Ge-based next-generation ton-scale experiment. We will report initial background levels in the 0νββ region of interest. Recent physics results will also be presented, which utilize P-type point-contact detectors with sub-keV energy thresholds to search for physics beyond the standard model at low energies; first results for searches of bosonic dark matter, solar axions, Pauli exclusion principle violation, and electron decay have been published. Finally, we will discuss the implications for the proposed future ton-scale 76Ge 0νββ LEGEND experiment.
        Speaker: Thomas Gilliss (U)
        Slides
      • 31
        Role of the isospin 3/2 component in nd elastic scattering and breakup
        Charge-independence breaking (CIB) is well established in the two-nucleon (2N) system in the 1S0 state as evidenced by the different values of the scattering lengths for the neutron-proton (np), proton-proton (pp) and neutron-neutron (nn) systems. That knowledge of CIB is incorporated into modern, high precision NN potentials, as exemplified by the standard semi-phenomenological models such as e.g. Av18, CD~Bonn, or NijmI and NijmII, as well as by the chiral nucleon-nucleon (NN) forces. Treating neutrons and protons as identical particles requires that nuclear systems are described not only in terms of the momentum and spin but also isospin states. The isospin violating 2N forces induce an admixture of the total isospin T=3/2 state to the dominant T={1/2 state in the three-nucleon (3N) system. The CIB of the NN interaction thus affects 3N observables. We present the exact treatment of the 3N system with CIB NN forces and three-nucleon forces (3NF's) included. In the calculations performed with the standard semi-phenomenological potentials we use the UrbanaIX (UIX) 3NF, while the chiral N2LO 3N force is used in addition to the recent and most accurate chiral NN interactions. Based on such dynamics we present the results and discuss the role of the three-nucleon isospin T=3/2 amplitude in elastic neutron-deuteron (nd) scattering and in the deuteron breakup reaction. The contribution of this amplitude originates from charge-independence breaking of the NN potential and is driven by the difference between nn and np forces. We study the magnitude of that contribution to the elastic scattering and breakup observables by taking the locally regularized chiral N4LO nucleon-nucleon potential supplemented by the chiral N2LO three-nucleon force. For comparison we employ also the Av18 nucleon-nucleon potential combined with the Urbana IX three-nucleon force. We find that the isospin T=3/2 component is important for the breakup reaction and the proper treatment of charge-independence breaking in this case requires the inclusion of the 1S0 state with isospin T=3/2. For neutron-deuteron elastic scattering the T=3/2 contributions are insignificant and charge-independence breaking can be accounted for by using the effective t-matrix generated with the so-called ``2/3-1/3" rule.
        Speaker: Henryk Witala (Jagiellonian University)
        Slides
      • 32
        Propagation of uncertainties of nucleon-nucleon potential to three-nucleon scattering observables
        The careful analysis of modern precise data requires not only the state-of-art theoretical approaches but also estimations of uncertainties of theoretical results. Using in ab-initio calculations nuclear interactions based on different physical assumptions, the uncertainties of potential parameters and, in case of the chiral forces, the truncation errors related to neglecting the higher orders of chiral expansions, belong to the most important sources of such uncertainties in few-nucleon sector. In recent years many efforts have been focused on clarifying this situation. The works of the Granada group focused on revising the existing data base for the nucleon-nucleon (NN) interaction and deriving, among others, the One-Pion-Exchange (OPE) Gaussian NN force [1,2]. This is a phenomenological potential which can be regarded as a remastered version of the AV18 force [3]. Since for the OPE-Gaussian force the uncertainty of its parameters together with their covariance matrix are known we use this force to estimate the corresponding uncertainty of theoretical predictions in the nucleon-deuteron (Nd) elastic scattering. Since these are the first calculations in which the OPE-Gaussian force is applied to study Nd elastic scattering I also briefly discuss description of the differential cross section and various spin observables for this process at energies up to the pion production threshold. The comparison of the obtained predictions with the ones based on the AV18 force will be shown. As mentioned above, in case of the predictions based on the chiral interactions, the truncation errors have to be taken into account. Using the newest chiral two-body interaction with the semi-local regularization up to fifth order of chiral expansion (N4LO) [4,5] we also study few-nucleon reactions [6,7,8]. Focusing again on the Nd elastic scattering I will present various observables and show the estimations for truncation errors obtained within the prescription given in [5,6]. The dependence of results on regularization parameter as well as comparison with experimental data will be also presented. Altogether such a study allows us to compare the magnitudes of uncertainties arising from different sources. This is important for further developing the few-body methods and NN forces. The presented results for Nd scattering will be obtained within the formalism of Faddeev equations [9]. [1] R.Navarro Perez, J.E.Amaro, and E.Ruiz Arriola, Phys. Rev. C89, 064006 (2014). [2] R.Navarro Perez, J.E.Amaro, and E.Ruiz Arriola, Phys. Rev. CPhys. Rev. C88, 064002 (2013); Erratum Phys. Rev. C91, 029901 (2015). [3] R.B.Wiringa, V.G.J.Stoks, and R.Schiavilla, Phys. Rev. C51, 38 (1995). [4] E.Epelbaum, H.Krebs, and Ulf-G.Meissner, Eur. Phys. J. A51, 26 (2015). [5] E.Epelbaum, H.Krebs, and Ulf-G.Meissner, Phys. Rev. Lett. 115, 122301 (2015). [6] S.Binder et al., Phys. Rev. C93, 044002 (2016). [7] R.Skibinski et al., Phys. Rev. C93, 064002 (2016). [8] R.Skibinski et al., Few Body Syst. 58, 28 (2017). [9] W.Glockle et al., Phys. Rept. 274, 107 (1996).
        Speaker: Roman Skibinski (Jagiellonian University)
    • Standard model physics at the TeV scale 301B

      301B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 33
        Measurement of the Higgs boson mass in the gamma gamma and 4-lepton decay channels with the ATLAS detector
        Speaker: Nello BRUSCINO (Pittsburgh)
        Slides
      • 34
        Measurement of photon production cross sections also in association with jets with the ATLAS detector
        Speaker: Enrico TASSI (Cosenza)
        Slides
      • 35
        Top quark production cross-section measurements
        Speaker: Markus Cristinziani (Physik. Institut, Universität Bonn)
        Diapositivas
      • 36
        Top quark properties and mass measurements with the ATLAS detector
        Speaker: Maria MORENO LLACER (CERN)
        Slides
      • 37
        Precision measurements with an electroweak boson in the final state with the ATLAS detector
        Speaker: Valerie Susanne LANG (DESY)
        Slides
    • 4:00 PM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

    • Dark matter and cosmology 303B

      303B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 38
        Dark Sector Physics with Belle II
        The next-generation B-factory experiment Belle II at the upgraded KEKB accelerator, SuperKEKB, will start physics data taking in 2018. It is an asymmetric e+e- collider that will operate with 40x the instantaneous luminosity of KEKB/Belle and aims to collect 50 times more data in total. Belle II offers the possibility to search for a large variety of dark sector particles in the GeV mass range complementary to LHC and dedicated low energy experiments. These searches will profit both from the very large dataset that will be acquired by the Belle II experiment, and from specifically designed triggers for the early running of Belle II. This talk will review planned dark sector searches with a focus on the discovery potential of the first data.
        Speaker: Fabrizio Bianchi (University of Turin)
        Slides
      • 39
        Searches for light new particles with BaBar data
        We report on the latest searches for low mass states predicted in several New Physics models performed with the data collected by the BaBar detector at the PEP-II e+e− collider. In particular, we search for single-photon events in a sample corresponding to 53 fb−1 of e+e− collision data. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle A′ through the process e+e−→γA′, A′→invisible. Such particles, referred to as “dark photons”, are motivated by theories applying a U(1) gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of A′→e+e− for a dark photon with a mass lower than 8 GeV. In particular, our limits exclude the values of the A′ coupling suggested by the dark-photon interpretation of the muon (g−2) anomaly, as well as a broad range of parameters. We also present a search for a new muonic dark force mediated by a gauge boson (Z′) coupling only to the second and third lepton families. The existence of the Z′ boson is probed in e+e−→μ+μ−Z′, Z′→μ+μ− events, No significant signal is observed. Limits on dark-sector coupling constants are derived, improving the current constraints to the allowed parameter space.
        Speaker: abi Soffer
        Slides
      • 40
        Dark photon searches at BESIII
        Many models beyond the Standard Model, motivated by the recent astrophysical anomalies, predict a new type of weak-interacting degrees of freedom. Typical models include the possibility of the low-mass dark gauge bosons of a few GeV and thus making them accessible at the BESIII experiment running at the tau-charm region. The BESIII has recently searched such dark bosons in several decay modes using the high statistics data set collected at charmonium resonaces. This talk will summarize the recent BESIII results of these dark photon searches and related new physics studies.
        Speaker: Dayong Wang (Peking University)
        Slides
    • Development of accelerators and detectors 305

      305

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 41
        Energy-frontier lepton-hadron collisions at CERN: the LHeC and the FCC-eh
        The Large Hadron-electron Collider (LHeC) is the prime candidate for future electron-hadron (proton and ion) collisions at the energy frontier. It will be the world's cleanest high-resolution microscope of the substructure of matter and a first high-precision Higgs facility with a large discovery potential running synchronously to the LHC's pp and heavy ion physics. It will provide electron-proton collisions with a center-of-mass energy of 1.3 TeV and instantaneous luminosity of order 1034 cm−2s−1. In electron-lead scattering, luminosities of about 1033 cm−2s−1 per nucleon are in reach. The talk presents an overview of the ongoing LHeC developments focussing on the energy recovery linac (ERL) configuration of a polarised 60 GeV electron beam. We will show recent studies on the civil engineering, beam-beam effects, the interaction region and the design of a high-precision eh detector based on modern technology. The talk also informs about the development of an ERL demonstrator, projected to be built at LAL Orsay, and about the use of a 60 GeV ERL for an eh configuration of 3.5 TeV center-of-mass energy running synchronously with FCC-hh. Further, we will present the unique, exciting LHeC and FCC-eh energy frontier physics program that can be roughly bundled into five topics: (i) Precision QCD, with an accurate determination of parton densities including the complete flavour decomposition and a per mille determination of the strong coupling constant; (ii) SM Higgs physics, with e.g. anticipated precisions of 0.2 (0.5%) and 1.8 (4%) for Higgs couplings to bb¯ and cc¯ at FCC-eh (LHeC); (iii) BSM physics, with a variety of possible discovery channels both in QCD, exotic Higgs, RPV SUSY, and sterile or right-handed neutrinos; (iv) High precision top and electroweak physics, with prospects for measurements such as top quantum numbers, anomalous and CKM couplings, and the W mass to (10)MeV precision in ep; (v) Nuclear dynamics probed in electron-ion scattering in the TeV regime, with unprecedented opportunities to resolve nuclear structure and dynamics in a hugely extended kinematic range. The LHeC and the FCC-eh studies are being prepared for presentation to the update in Europe's HEP strategy and beyond.
        Speaker: Prof. Masahiro Kuze (Tokyo Institute of Technology)
        Slides
      • 42
        Status of the art TOF detector
        Speaker: Yi Wang (Department of Engineering Physics, Tsinghua University)
        Slides
      • 43
        Investigation of the tracker detector TPC with laser calibration and alignment
        The precious tracker detector of Time Projection Chamber (TPC) has been extensively studied and used in many fields, especially in particle physics experiments of STAR TPC and ALICE TPC. Its low material budget in drift length and excellent pattern recognition capability make it a prefer ideal device for three-dimensional tracking and identification of charged particles. In high energy physics field, it has been as one option of ILD detector concept in the international linear collider as the tracker detector. In the circular machine, likely CEPC concept, the tracker detector requirement of the position resolution is about 100μm in rФ of the endcape. For a precise position resolution of the tracks in the TPC prototype, the calibration of the drift velocity, which in conjunction with the drift time provides the z position of the traversing particles, is essential. Due to the un-stability of the electric field and the continouse ions back flow in the drift chamber, the drift velocity and electric field could influence significantly the detector performance. It’s a problem in the precious resolution tracker detector's design. In this paper, the 266nm wavelength UV laser system including the laser rods,the reflection mirrors, and the fused silica windows has been designed and developed for the tracker detector. Along the ~500mm drift length of the TPC prototype, three layers of laser beam has been created and the divided 72 laser trackers will inject to the drift chamber separately. Every laser beam track has more than 10uJ/mm^2 to make more than 10 MIPs primary electrons. The details of the detector prototype integrated the UV laser system will be descried. To meet the high stability drift velocity's requirement, the calibration and alignment methods would be investigated. Finally, some preliminary results simulation and measurement, and discussion would be given.
        Speaker: Dr Huirong Qi (Institute of High Energy Physics, CAS)
        Slides
    • Flavor physics - CKM and beyond 302B

      302B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 44
        Recent results of B decays from Belle
        We report recent results on B decays from Belle experiment at KEKB collider. The $B \to D^{(*)} \tau \nu $ mode is sensitive to probe New Physics such as charged Higgs or leptoquark, and the current world average of the branching ratio shows discrepancy from the Standard Model. Belle has performed a new measurement of this mode using tau decays to hadronic final states, which is essentially independent of previous measurements from Belle. With this method, we have measured the tau lepton polarization in $B \to D^{(*)} \tau \nu $ for the first time. We also report the full angular analysis of $B \to K^* l^+ l^- $ to extract variables such as $P_5'$ which are largely free of form factor uncertainties. The measurement is performed separately for $B \to K^* e^+ e^- $ and $B \to K^* \mu^+ \mu^- $ modes, which makes it possible to study lepton universality on these variables. The analyses are based on the full data set of Belle containing 772 million $B\bar{B} $ pairs.
        Speaker: Martin Heck (Karlsruhe Institute of Technology)
        Slides
      • 45
        Charm physics prospects at the Belle II experiment
        Belle II is a major upgrade of the Belle experiment, and will operate at the B-factory SuperKEKB, located at the KEK laboratory in Tsukuba, Japan. Belle II will be an ideal laboratory to study the properties of the charm quark, collecting more than 5x10^10 ccbar events with a total integrated luminosity of about 50 ab^-1 in the next decade. We will discuss the expected sensitivity of Belle II for CPV measurements and New Physics searches in the charm sector. Estimates for several decay channels will be presented, in particular for those with lepton-neutrino, neutral pions and other neutrals in the final state. Alternative flavour-tagging techniques has been developed, a novel flavour-tagging method of prompt D0s will be presented. Finally, we will present the impact of the improved tracking at Belle II, which will allow to significantly increase the precision of time-dependent measurements.
        Speaker: Longke Li (IHEP, Beijing)
        Slides
      • 46
        Studies of missing energy decays at Belle II
        The Belle II experiment at the SuperKEKB collider is a major upgrade of the KEK ``B factory'' facility in Tsukuba, Japan. The machine is designed for an instantaneous luminosity of 8x10^35 cm^-2s^-1, and the experiment is expected to accumulate a data sample of about 50 ab^-1 in five years of running. With this amount of data, decays sensitive to physics beyond the Standard Model can be studied with unprecedented precision. One promising set of modes are physics processes with missing energy such as B^+ to tau^+ nu, B to D^(*) tau nu, and B to K^(*) nu nu-bar decays. The B--> K^(*) nu nu-bar decay provides one of the cleanest experimental probes of the flavour-changing neutral current process b-->s nu nu-bar, which is sensitive to physics beyond the Standard Model. However, the missing energies of the two neutrinos in the final state makes the measurement challenging and requires full reconstruction of the spectator B meson in e^+ e^---> Upsilon(4S)--> BBbar events. Observation of the B--> K^(*) nu nu-bar decay will become possible with the large data set to be collected by the upgraded Belle II experiment running at the Super-KEKB accelerator in Japan. A challenge of this analysis will be understanding and suppressing backgrounds. This talk discusses such backgrounds and the expected sensitivity of Belle II for this rare decay.
        Speaker: Yinhui Guan
        Slides
      • 47
        Measurement of the gamma CKM angle with Belle II
        The CKM angle gamma is the least well known of the angles of the unitarity triangle and the only one that is accessible with tree-level decays in a theoretically clean way. It provides a Standard Model benchmark against which other measurements can be compared. The key method to measure gamma is through the interference between B^+ to D^0 K^+ and B^+ to \overline{D}^0 K^+ decays which occurs if the final state of the charm-meson decay is accessible to both the D^0 and \overline{D}^0 mesons. To achieve the best sensitivity, a large variety of D and B decay modes is required and is possible at Belle II experiment as almost any final state can be reconstructed including those with photons. With a data sample corresponding to an integrated luminosity of 50 ab^-1 expected by 2026, a determination of gamma with a precision of 1 degree or better is foreseen. This will approximately match the uncertainty on this parameter from indirect constraints from other measurements.
        Speaker: Hulya Atmacan
        Slides
    • Hadron spectroscopy and exotics 303A

      303A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 48
        A few certainties and many uncertainties about multiquarks
        In this talk I will review recent studies on multiquark spectroscopy regarding four, five and six quark systems making emphasis on the role played by confinement. I will discuss in detail all-heavy tetraquarks. I will also address the role played by entangled thresholds and the failure of heavy quark mass expansions in some particular systems. I would review some recent works in collaboration with J. Vijande and J.-M. Richard.
        Speaker: Prof. Javier Vijande Asenjo (University of Valencia)
        Slides
      • 49
        Hidden-Charm Decays: An Elegant Probe for Internal Structure
        In heavy quarkonia, hadronic transitions serve as an enlightened probe for the structure and help to establish the understanding of light quark coupling with heavy degree of freedom. We propose a new model to create light meson(s) in heavy quarkonium transitions, which is inspired by Nambu-Jona-Lasinio model. The model shows its potential to reproduce the observed decay widths and make predictions for the unobserved channels. In this contribution, we present our predictions for the hidden-charm decays of higher $S$ and $D$ wave vector charmonia. We also suggest $J^{PC}$ assignments for several experimentally observed vector charmonium-like states. We hope that our predictions [1] might provide useful references to determine the properties of higher charmonia in ongoing and forthcoming experiments. [1] M. N. Anwar, Y. Lu and B.-S. Zou arXiv:1612.05396 [hep-ph], Submitted to PRD
        Speaker: Mr Muhammad Naeem Anwar (ITP-CAS)
        Slides
    • Hot and dense matter physics (QGP and heavy ion collision) 302A

      302A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 50
        The STAR beam energy scan phase II physics and upgrades
        The second phase of the Beam Energy Scan at RHIC, BES-II, is scheduled for 2019-2020 and will explore with precision measurements the high baryon density region of the QCD phase diagram. The program will examine the energy region of interest from 7.7 to 19.6 GeV which is determined from the results of BES-I. Some of the key measurements anticipated are: the net-protons kurtosis that could pinpoint the position of a critical point, the directed flow that might prove a softening of the EOS, and the chiral restoration in the dilepton channel. The measurements will be possible with the order of magnitude better statistics provided by the electron cooling upgrade of RHIC and with the detector upgrades planned to extend STAR's experimental reach. The upgrades are: the inner TPC sectors (iTPC), the Event Plane Detector (EPD), and the end-cap TOF (eTOF). We will present upgrade details both on detectors and collider in BES-II. The operation plan for BES-II will be shown. The physics opportunities enabled by these upgrades will be discussed.
        Speaker: Dr CHI YANG (USTC)
        Slides
      • 51
        Longitudinal Double Spin Asymmetries of $\pi^{0}$ - Jet Correlations in Polarized Proton Collisions at $\sqrt{s}$ = 510 GeV at STAR
        One of the primary goals of the spin physics program at STAR is to constrain the polarized gluon distribution function, Δg(x), by measuring the longitudinal double-spin asymmetry (${A}{LL})ofvariousfinal−statechannels.Usingajetinthemid−rapidityregion|\eta|<0.9correlatedwithaback−to−backneutralpionintheforwardrapidityregion0.8<\eta<2.0intheSTARendcapprovidesanewtooltoaccessthe\Delta g(x)distributionatBjorken−{x}downto0.01.Comparedtoinclusivejetmeasurements,thischannelalsoallowstoconstraintheinitialpartonkinematics,suchas{x}{1},{x}{2}andinvariantmass.Inthistalk,wewillpresentthestatusoftheanalysisofthe\pi^{0}−jet{A}{LL}inlongitudinallypolarizedproton+protoncollisionsat\sqrt{s}=510GeV,extractedfrom80pb^{-1}ofdatatakenduringthe2012RHICrun.Wealsocomparetotheoreticalpredictionsofthe{A}_{LL}$ by next-to-leading order (NLO) model calculations with different polarized parton distribution functions.
        Speaker: Dr Yaping Wang (Institute of paticle physics, Central China Normal University)
        Slides
      • 52
        Measurements of open bottom and charm hadron production through multiple decay channels in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV with the STAR experiment
        Heavy quarks are predominantly produced at early stages of the relativistic heavy-ion collisions before the creation of the QCD medium, known as the Quark-Gluon Plasma (QGP). Heavy quarks may traverse the QGP throughout its evolution, and thus are suggested as an excellent probe to study the properties of the QGP. Comparing the yield of heavy-flavor hadron decayed electrons at large transverse momenta in Au+Au collisions with that in p+p collisions at sNN‾‾‾‾√ = 200 GeV, a significant suppression has been observed. This suppression is believed to be caused by the energy loss of heavy flavor quarks through interactions with the QGP, which is expected to be different for bottom and charm quarks because of their different masses. Measurements of open bottom and charm hadron production separately in Au+Au collisions are crucial to test the mass hierarchy of the parton energy loss. In this talk, we will present measurements of open bottom and charm hadron production through multiple decay channels in Au+Au collisions at sNN‾‾‾‾√ = 200 GeV by the STAR experiment. Specifically, measurements of nuclear modification factors for electrons, D0 and J/ψ from open bottom hadron decays will be shown. The decay products are topologically identified utilizing the Heavy Flavor Tracker, a silicon vertex detector installed at STAR during the period of 2014 - 2016. These results will be compared to those of open charm hadrons to study the mass dependence of the parton energy loss in the QGP at RHIC.
        Speaker: Ms Shenghui Zhang (University of Science and Technology of China)
        Slides
      • 53
        Measurements of J/ψ production and polarization in p+p and p+Au collisions at √sNN = 200 GeV with the STAR experiment
        Quarkonium production is an important tool to study the properties of the Quark-Gluon Plasma (QGP) formed in relativistic heavy-ion collisions. In particular, suppression of the J/ψ meson production due to the color screening effect in the medium was proposed as a direct evidence of the QGP formation. However, interpretation of the J/ψ suppression measured in heavy-ion collisions is still challenging due to the presence of other effects, such as the regeneration contribution from the coalescence of deconfined c and c quarks as well as the cold nuclear matter effects. By comparing J/ψ production cross-sections in p+p and p+Au collisions, the cold nuclear matter effects can be studied in detail. Moreover, J/ψ polarization is sensitive to the J/ψ production mechanism, and its measurement can help distinguish among different models. During the RHIC 2015 run, the STAR experiment recorded large samples of p+p and p+Au collisions at √sNN = 200 GeV for charmonium studies via the dimuon decay channel. In this talk, we will present measurements of the nuclear modification factor for J/ψ over a broad kinematic range in p+Au collisions, to quantify the cold nuclear matter effects. The double ratio of ψ(2S) to J/ψ production rates between p+p and p+Au collisions at mid-rapidity is measured for the first time, to study possible different final-state effects on different charmonium states. Furthermore, we will discuss the analysis status of J/ψ polarization measurements in both p+p and p+Au collisions.
        Speaker: Zhen LIU (University of Science and Technology of China)
        Slides
    • Neutrino physics 301A

      301A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 54
        Results from the NOvA Experiment
        The NOvA experiment is a long-baseline accelerator-based neutrino oscillation experiment. It uses the upgraded NuMI beam from Fermilab to measure electron-neutrino appearance and muon-neutrino disappearance between the Near Detector, located at Fermilab, and the Far Detector, located at Ash River, Minnesota. The NuMI beam has recently reached and surpassed the 700kW power benchmark. NOvA's primary physics goals include precision measurements of oscillation parameters, such as theta13, theta23, and the atmospheric mass-squared splitting, along with probes of the mass hierarchy and of the CP violating phase. This talk will present the latest NOvA results, based on a neutrino beam exposure equivalent to 6.05E20 protons-on-target
        Speaker: Erica Smith (I)
        Slides
      • 55
        The CUORE bolometric detector for neutrinoless double beta decay searches
        The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment reaching the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers. The construction of the experiment and, in particular, the installation of all towers in the cryostat was completed in August 2016: the experiment is now in pre-operation phase and data taking is commencing. In this talk, we will discuss the technical challenges of the construction and pre-operation phases, the design choices and measured performance of its electronic instrumentation and the first results from the full detector runs.
        Speaker: Lucia Canonica (LNGS)
        Slides
      • 56
        Measurements of the reactor antineutrino with solid state scintillation detector
        Measurements of reactor antineutrino play an important role in the efforts at the frontier of the modern physics. The DANSS collaboration presents preliminary results of a one year run with a cubic meter solid state detector placed below 3.1 GW industrial light water reactor. The experiment is sensitive to sterile neutrino in the most interesting region of mixing parameter space. 2500 scintillation strips of the sensitive volume of the detector have multilayer passive shielding of copper, lead and borated polyethylene and active muon veto. Detector position below the reactor gives an advantage of overburden about 50 m of water equivalent providing factor of 6 in cosmic muon suppression and eliminating fast neutrons.The detector is placed on a vertically movable platform which allows to change the distance to the reactor core center in the range 10.7-12.7 m within a few minutes. The strips are read out individually by SiPMs and in groups of 50 by PMTs. 5000 inverse beta-decay events per day are collected in the fiducial volume, which is 78% of the whole detector, at the position closest to reactor. Overburden, active veto and good segmentation of the detector result in an excellent signal to background ratio. The talk is dedicated to the data analysis and preliminary results. The experiment status is also presented.
        Speaker: Igor Alekseev (ITEP)
        Slides
      • 57
        Status of the Hyper-Kamiokande experiment
        Hyper-Kamiokande is a next generation water Cherekov detector consisting of 2 tanks, each with 187 kton fiducial mass, to be built in a staged approach. Hyper-Kamiokande will detect neutrinos produced by the upgraded J-PARC accelerator complex, as well as atmospheric neutrinos. It will enable us to search for CP violation in the lepton sector with an order of magnitude more data than current long baseline experiments will collect. Hyper-Kamiokande will also make precision measurements of the phase delta_cp and the atmospheric mixing parameters by a combination of accelerator and atmospheric neutrinos. This talk will describe the Hyper-Kamiokande neutrino oscillation physics program. Recent studies of the option for building the second tank in Korea to probe mass hierarchy and the second oscillation maximum will also be presented.
        Speaker: Prof. Masahiro Kuze
        Slides
    • Standard model physics at the TeV scale 301B

      301B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 58
        Measurements of the effective weak mixing angle in dimuon events at D0
        We present the measurements of forward-backward charge asymmetry $A_{FB} $ in $p\bar{p}\rightarrow Z/\gamma^{*} \rightarrow \mu^+\mu^- $ events using $9.7 \ $fb$^{-1}$ of $ p\bar p$ data collected at $\sqrt s=1.96\ $TeV by the D0 detector at the Fermilab Tevatron collider. $A_{FB}$ is measured as a function of the invariant mass of the dimuon system to extract the effective weak mixing angle $\sin^2\theta^{lep}_{eff}$. In the context of the standard model, using the on-shell renormalization scheme where $\sin^2\theta_W = 1 - M_W^2/M_Z^2$, measurements of $\sin^2\theta^{lep}_{eff}$ yield indirect extractions of the W mass. The result will contribute to the final Tevatron combination of the weak mixing angle and indirect $m_{W}$ measurements.
        Speakers: D0 Collaboration (Fermilab) , Dr Liang HAN (USTC)
        Slides
      • 59
        Cross section and coupling measurements with the ATLAS detector for the 125 GeV Higgs Boson in the diboson decay channels
        Speaker: Tiesheng Dai (University Michigan)
        Slides
      • 60
        Cross section and coupling measurements with the ATLAS detector for the 125 GeV Higgs Boson in the fermion decay channels
        Speaker: Kristian GREGERSEN (London UC)
        Slides
      • 61
        Diboson Production, vector boson fusion and vector boson scattering measurements with the ATLAS detector
        Speaker: Cong GENG (Michigan)
        Slides
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 62
        EW and QCD Measurements
        Speaker: Fengwangdong Zhang (Peking University)
        Slides
      • 63
        Higgs results
        Speaker: Kirill PROKOFIEV (Hong Kong HKUST)
        Slides
      • 64
        European Research Council - Funding opportunities for frontier science
        This session will present European Research Council (ERC) funding opportunities, available for both early career researchers and senior research leaders. The ERC operates according to a «bottom-up», approach, allowing researchers to identify new opportunities in any field of research. It encourages competition for funding between the very best, creative researchers of any nationality and age. An update will be given on the calls, deadlines and budgets, applicants’ suitable profiles and other relevant information. The presentation will be addressing equally all fields of science and scholarship.
        Speaker: Dr Luis FARINA-BUSTO (European Research Council Executive Agency)
        Slides
    • 10:15 AM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 65
        Energy frontier physics beyond the standard model: Theory
        Speaker: Prof. Liantao Wang (University of Chicago)
        Slides
      • 66
        Searches for supersymmetry
        Speaker: Dr Andrea Ventura (Università del Salento &amp; INFN Lecce (Italy))
        Slides
      • 67
        Exotic Searches
        Speaker: Dr Varun Sharma (Florida State Univ.)
        Slides
    • 12:15 PM
      Lunch Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Development of accelerators and detectors 301A

      301A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 68
        The CMS ECAL Upgrade for Precision Crystal Calorimetry at the HL-LHC
        The electromagnetic calorimeter (ECAL) of the Compact Muon Solenoid Experiment (CMS) is operating at the Large Hadron Collider (LHC) in 2016 with proton-proton collisions at 13 TeV center-of-mass energy and at a bunch spacing of 25 ns. Challenging running conditions for CMS are expected after the High-Luminosity upgrade of the LHC (HL-LHC). We review the design and R&D studies for the CMS ECAL crystal calorimeter upgrade and present first test beam studies. Particular challenges at HL-LHC are the harsh radiation environment, the increasing data rates and the extreme level of pile-up events, with up to 200 simultaneous proton-proton collisions. We present test beam results of hadron irradiated PbWO crystals up to fluences expected at the HL-LHC. We also report on the R&D for the new readout and trigger electronics, which must be upgraded due
        Speaker: David Anthony Petyt
        Slides
      • 69
        The CMS High Granularity Calorimeter for HL-LHC
        The High Luminosity LHC (HL-LHC) will integrate 10 times more luminosity than the LHC, posing significant challenges for radiation tolerance and event pileup on detectors, especially for forward calorimetry, and hallmarks the issue for future colliders. As part of its HL-LHC upgrade program, the CMS collaboration is designing a High Granularity Calorimeter to replace the existing endcap calorimeters. It features unprecedented transverse and longitudinal segmentation for both electromagnetic (ECAL) and hadronic (HCAL) compartments. This will facilitate particle-flow calorimetry, where the fine structure of showers can be measured and used to enhance pileup rejection and particle identification, whilst still achieving good energy resolution. The ECAL and a large fraction of HCAL will be based on hexagonal silicon sensors of 0.5 - 1 cm^2 cell size, with the remainder of the HCAL based on highlysegmented scintillators with SiPM readout. The intrinsic highprecision timing capabilities of the silicon sensors will add an extra dimension to event reconstruction, especially in terms of pileup rejection. An overview of the HGCAL project is presented, covering motivation, engineering design, readout and trigger concepts, and performance (simulated and from beam tests).
        Speaker: luca Mastrolorenzo
        Slides
      • 70
        Large scale beam-tests of silicon and scintillator-SiPM modules for the CMS High Granularity Calorimeter for HL-LHC
        The High Granularity Calorimeter (HGCAL) will replace the existing CMS endcap calorimeters for the HL-LHC era. The electromagnetic part, as well as the first layers of the hadronic part, foresees around 600 square metres of silicon sensors as the active material. The remainder of the HGCAL, in the lower radiation environment, will use plastic scintillator with on-tile SiPM readout. Prototype hexagonal silicon modules, featuring a new ASIC (Skiroc2-CMS), together with a modified version of the scintillator- SiPM CALICE AHCAL, have been built and tested in beams at CERN. This setup represents a full slice through HGCAL. We present first results on stability, linearity and energy resolution for incident electrons, pions and muons.
        Speaker: SHILPI JAIN (National Central University, Taiwan)
        Slides
      • 71
        Precision Timing Calorimetry with the upgraded CMS Crystal ECAL
        Particle detectors with a timing resolution of order 10 ps can improve event reconstruction at high luminosity hadron colliders tremendously. The upgrade of the Compact Muon Solenoid (CMS) crystal electromagnetic calorimeter (ECAL), which will operate at the High Luminosity Large Hadron Collider (HL-LHC), will achieve a timing resolution of around 30 ps for high energy photons and electrons. In this talk we will discuss the benefits of precision timing for the ECAL event reconstruction at HL-LHC. Simulation and test beam studies carried out for the timing upgrade of the CMS ECAL will be presented and the prospects for a full implementation of this option will be discussed.
        Speaker: Paolo Meridiani (C)
        Slides
      • 3:40 PM
        Coffee Break
    • Energy frontier physics beyond the standard model 302A

      302A

      China National Convention Center

      • 72
        Searches for Heavy Higgs bosons A, H, H+ and H++ with the ATLAS detector
        Speaker: Jana Schaarschmidt (University of Washington)
        Slides
      • 73
        Search for heavy Higgs boson in fermionic decay channels with CMS
        Latest results of searches for heavy Higgs bosons in fermionic final state are presented using the CMS detector at LHC. Results are based on pp collision data collected at centre-of-mass energies of 8 and 13 TeV which have been interpreted according to different extensions of the Standard Model such as 2HDM, MSSM, NMSSM. These searches look for evidence of other scalar or pseudoscalar bosons, in addition to the observed SM-like 126 GeV Higgs boson, and set exclusion limits in fermionic final states and benchmark models explored. The talk reviews briefly the major results obtained by CMS during Run I, and present the most recent searches during Run II.
        Speaker: Ye Chen
        Slides
      • 74
        Search for non-standard and rare decays of the Higgs boson with the ATLAS detector
        Speaker: Dr Katharine Leney (University of the Witwatersrand)
        Slides
      • 75
        On a possibility of the gravitational wave detection at the high energy colliders
        A strong follow up of a previous proposal (ICHEP, Valencia 2014) is made leading to the first experiment to observe the gravitational waves at the collision sites at the colliders such as the Large Hadron Collider at CERN. The amplitudes have been calculated with regard to the sensitivity of the detector. Compared with the standard model physics, it is show to have a measurable impact on the particle motions and corresponds to 'missing' energy in form of the gravitational wave loss. This is unlike the cosmological detectors like BICEP2 etc. where the indirect B mode polarization on CMBR were masked by dust. In contrast, this experiment would be the first experiment where the energy-momentum tensor of the source can be controlled.
        Speaker: Murli Verma (U)
        Slides
      • 76
        New results of R-parity-violating MSSM contributions to neutral mesons’ mixing
        Low-energy flavour observables provide powerful tests of physics beyond the Standard Model. We calculate $\Delta M_{B^0_d/B^0_s/K^0}$, arising from the respective neutral mesons’ mixing, by using the R-parity-violating Minimal Supersymmetric Standard Model (RPV-MSSM) including the mixing effects induced by the bilinear RPV term in the superpotential. We take into account all contributions at the tree- and the one-loop level which arise due to new physics. While most partial results agree with the existing literature, we do find differences which we point out accordingly.
        Speaker: Mr Zeren Simon Wang (BCTP, University of Bonn)
        Slides
    • Hadron spectroscopy and exotics 303A

      303A

      China National Convention Center

      • 77
        Light hadron spectroscopy at BESIII
        The unambiguous identification and systematic study of bound states beyond the constituent quark degrees of freedom, e.g., multiquark states or states with gluonic degrees of freedom (hybrids, glueballs) would provide validation of and valuable input to the quantitative understanding of QCD. Hadron spectroscopy is one of the most important physics goals of BESIII. Since 2009, BESIII has collected 1.3 *10^8 J/psi and 0.4*10^8 of psi', which are the world's largest data samples of J/psi and psi' from e+e- collision. Radiative decays of charmonium provide a gluon-rich environment and are therefore regarded as one of the most promising hunting grounds for gluonic excitations. Significant progresses in the light-quark sector have been made with the unprecedented high statistics data sets. Several recent results on light hadron spectroscopy and light hadron decays will be reported, including: 1, the observation of the anomalous line shape of X(1835) near pp mass threshold and related studies; 2, studies of glueballs in J/psi radiative decays; 3, search for 1- + exotic in chi_c1->eta pi pi.
        Speaker: Prof. Xingtao Huang (SDU)
        Slides
      • 78
        Light Meson Spectroscopy at GlueX
        GlueX at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for light hybrid mesons. To this end, a linearly-polarized $9\,$GeV photon beam impinges on a hydrogen target contained within a hermetic detector with near-complete neutral and charged particle coverage. In 2016, the experiment completed its commissioning and subsequently started to take data in its design configuration. With the size of the data set so far, GlueX already exceeds previous experiments for polarized photoproduction in this energy regime. A selection of early results will be presented, focusing on beam asymmetries for pseudo-scalar and vector mesons. The potential to make significant contributions to the field of light-meson spectroscopy is highlighted by the observation of several known meson resonances. Furthermore, the strategy to map the light meson spectrum with amplitude analysis tools will be outlined.
        Speaker: Alexander Austregesilo (Jefferson Lab)
        Slides
      • 79
        Study of charmoniumlike states with initial state radiation at Belle II
        The study of initial state radiation (ISR) events at Belle II provides independent and contiguous measurements of hadronic cross sections in and also contributes to the investigation of low-mass resonances spectroscopy. Belle II has the advantage that data at different energies will be accumulated at the same time, making the ISR analysis much simpler than other experiments where the data was taken at some fixed energy points. In addition, Belle II can produce events above 4.6 GeV, which is currently the maximum energy of BEPCII. With larger than 10 ab^-1 data sample at Belle II, we will do ISR processes e^+e^- to pi^+ pi^-J/psi, pi^+ pi^- psi(2S), K^+ K^- J/psi, gamma X(3872), etc. Sensitivity studies of e^+e^- to Y(4260) to pi^+pi^- J/psi and e^+e^- to Y(4360,4660) to pi^+ pi^-\psi(2S) under different integrated luminosities are ongoing.
        Speaker: Xiaolong Wang
        Slides
      • 80
        Exotic and conventional bottomonium physics prospects at BELLE II
        The Belle II experiment, being constructed at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB accelerator. It aims to collect 50 times more data than existing B-Factory samples beginning in 2018. Belle II is uniquely capable to study the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now number in the dozens, and represent the emergence of a new category within quantum chromodynamics. This talk will present the capabilities of Belle II to explore exotic and conventional bottomonium physics. There will be a particular focus on the physics reach of the first data, where opportunities exist to make an immediate impact in this area.
        Speaker: Roberto Mussa
        Slides
      • 81
        The high-energy photoproduction of light-quark pseudoscalar and scalar mesons at GlueX
        The high-energy photoproduction of light-quark pseudoscalar and scalar mesons is an effective tool for understanding the properties of strong interaction in the nonperturbative regime. It has been investigated theoretically using Regge-cut phenomenology with massive quasi-particle exchange in high-energy regime, and the linearly polarized photon beam asymmetry $\Sigma$ can provide insight into dominant production mechanism. In the low-energy region, it can provide constraints on "background" to baryon resonance extraction. With almost 50-year history, intensive experiments on meson photoproduction are growing vigorously at several international laboratories, such as JLab, ELSA, and MAMI. Recently the beam asymmetry $\Sigma$ in high-energy $\pi^0/\eta$ photoproduction has been measured at GlueX, which is the first measurement both from the GlueX experiment and the 12-GeV-upgraded JLab. The highest precision measurement of the $\pi^0$ asymmetry and the first measurement of $\eta$ beam asymmetry at the energy above $E_{\gamma} = 3$ GeV are presented. A broad meson photoproduction project, including scalar meson $a_0(980) /f_0(980)$, is under way at GlueX. In this talk, we will report the beam asymmetry results for $\pi^0/\eta$ photoproduction at GlueX, as well as preliminary results for scalar meson photoproduction in the $\pi^0 \pi^0$ and $\pi^0 \eta$ channels.
        Speaker: Dr Zhenyu ZHANG (Wuhan University)
        Slides
    • Hadron spectroscopy and exotics 303B

      303B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 82
        Measurement of exclusive hadronic cross sections and implications on the g-2 of the muon with the BABAR detector
        The BABAR Collaboration has an intensive program studying hadronic cross sections in low-energy $e^+e^-$ annihilations, accessible via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on the current ~3 sigma difference between the predicted and the experimental values. We have published results on a number of processes with two to six hadrons in the final state, and other final state are currently under investigation. We report here on the most recent results obtained by analysing the entire BABAR dataset, in particular the measurement of the $e^+e^- \to \pi^+\pi^-\pi^0\pi^0$, which is one of the least known contribution to the cross section in the energy region between 1 and 2 GeV. We also present the measurement of the $\pi^+\pi^-\eta$, and of the full set of final states with two kaons and two pions.
        Speaker: Fabrizio Bianchi (University of Turin)
        Slides
      • 83
        Form factor measurements at BESIII for an improved Standard Model prediction of the muon g-2
        The anomalous magnetic moment of the muon, $(g-2)_\mu$, allows for one of the most precise tests of the Standard Model of particle physics. We report on recent results by the BESIII collaboration of exclusive hadronic cross section channels, such as the 2pi, 3pi, and 4pi final states. These measurements are of utmost importance for an improved calculation of the hadronic vacuum polarization contribution of $(g-2)_\mu$, which currenty is limiting the overall Standard Model prediction of this quantity. BESIII has furthermore also intiatated a programme of spacelike transition form factor measurements, which can be used for a determination of the hadronic light-by-light contribution of $(g-2)_\mu$ in a data-driven approach. These are results are of relevance in view of the new and direct measurements of $(g-2)_\mu$ as foreseen at Fermilab/USA and J-PARC/Japan.
        Speaker: Dr Marco Destefanis (Università degli Studi di Torino and INFN)
        Slides
      • 84
        Hadron form factors at BESIII
        Electromagnetic form factors of baryon provide fundamental information about its structure and dynamics. They constitute a rigorous test of nonperturbative QCD as well as of phenomenological models. Using data samples collected with BESIII detector at BEPCII collider, We measure Born cross section of e+e- -> ppbar at center-of-mass energy between 2.0GeV and 3.08GeV. The ratio |GE/GM| and |GM |are extracted by fitting polar angle distribution of proton for data samples with large statistics. For BESIII data between 3.773 and 4.6GeV, We also use initial state radiation (ISR) method to study e+e- -> ppbar by tagged ISR photon or un-tagged ISR photon. The cross section of e+e- -> ppbar and ratio |GE/GM| are obtained. For e+e- ->Λ_c^+ Λ_c^- process, very weak energy dependence of cross section near threshold indicates that traditional theoretical prediction, which does not take into account strong interaction, needs to be modified. With the large statistics of multiple decay modes, The ratio |GE/GM| and |GM |are extracted.
        Speaker: Dr 召霞 孟 (高能所)
        Slides
    • Hot and dense matter physics (QGP and heavy ion collision) 302B

      302B

      China National Convention Center

      • 85
        Constraining the Gluon Polarization Distribution with Jet, Dijet, and Neutral Pion Probes at STAR
        A major goal of the proton spin physics program at the Relativistic Heavy Ion Collider (RHIC) is to constrain the gluon polarization distribution $\Delta g (x)$ and thus determine the contribution of gluons to the spin of the proton. Measurements of spin asymmetries with jets and neutral pions at central pseudorapidities at STAR and PHENIX have been critical to this effort. Recent global analyses have demonstrated a positive contribution to the spin of the proton from mid-to-high $x$ gluons (e.g. $x > 0.05$). But, the gluon polarization remains poorly constrained at low $x$. A variety of measurements at STAR have been recently completed, or are now underway, to better constrain the gluon polarization distribution. The STAR detector is well suited for a campaign of spin asymmetry measurements featuring full azimuthal coverage and a range of detector capabilities. Specifically, we will present measurements of the doubly-longitudinal spin asymmetry, $A_{LL}$. STAR has excellent tracking in the mid-rapidity ($|\eta| < 1.3$) region, useful for jet measurements, while mid-rapidity ($|\eta| < 1.0$) and intermediate-rapidity calorimetry ($1.09 < \eta < 2.00$) contribute to jet measurements and both of these calorimeters and a forward system ($2.65 < \eta < 4.0$) allow measurements with neutral pions. Inclusive jet measurements at mid-rapidity remain a core part of the STAR program while measurements with correlated observables like dijets provide more precise information about the initial-state parton kinematics. Moving to forward pseudorapidities allows us to probe lower partonic momenta, as does moving to higher center-of-mass energy. We will present the status of a variety of asymmetry measurements and the results of others using jet, dijet and neutral pion probes with longitudinally polarized $p+p$ datasets at $\sqrt{s} = 200$ GeV (25 pb$^{-1}$) and $\sqrt{s} = 510$ GeV (382 pb$^{-1}$).
        Speaker: Prof. Adam Gibson (Valparaiso University)
        Slides
      • 86
        Polarization measurements of $\Lambda$ hyperons and K$^{*0}$ vector mesons with ALICE at the LHC
        Polarization of hyperons and vector mesons in non-central heavy-ion collisions could occur due to the large initial angular momentum of the system or during the process of hadronization. Polarization studies of hyperons and vector mesons can give us information about the initial angular momentum in heavy-ion collisions. This phenomenon could create a non-uniform angular distribution of the decay products with respect to the quantization axis in the rest frame of the mother particle. This quantization axis can be the normal to the production plane (plane subtended by the momentum of the mother particle and the beam axis) or the normal to the reaction plane (defined by the impact parameter and the beam axis) of the system. This angular distribution can be used to estimate the polarization of Λ-baryons (PΛ) and the spin density matrix element ρ00 for vector mesons. A significant deviation of the value of PΛ from 0 or ρ00 from 1/3 would indicate the presence of polarization for hyperons and vector mesons, respectively. We will present the first results from the polarization study of Λ hyperons and K$^{0}vectormesonsatmid−rapidityinPb−Pbcollisionsandinppcollisionsatcentreofmassenergiesof2.76TeVand13TeV.ThecentralitydependenceofP_{\Lambda}and\rho_{00}willbepresented.PolarizationmeasurementsofK^{0}vectormesonswillalsobecomparedtotheresultsfromK_{s}$$^{0}$ (spin zero) mesons for which no polarization signal is expected.
        Speaker: Sourav Kundu (N)
        Slides
      • 87
        Measurement of D-meson nuclear modification factor and elliptic flow in PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV with ALICE at the LHC
        Open heavy-flavour hadrons are unique probes to study the Quark-Gluon Plasma formed in ultra-relativistic heavy-ion collisions. Due to their large masses, heavy quarks are produced in hard scattering processes in the early stages of the collisions and thus experience the full evolution of the medium, loosing part of their energy interacting with its constituents. The in-medium energy loss can be studied by measuring the nuclear modification factor (RAA), which compares the pT-differential yield in Pb-Pb collisons with that in pp collisions (σpp × tAA gives the reference yield). The measurement of the azimuthal anisotropy (elliptic flow, v2) of D-meson production in semi-central collisions allows to investigate, at low pT, the participation of the heavy quarks in the collective expansion of the system and their thermalization in the medium. At high pT, the measurement of v2 can provide information on the path length depencence of parton energy loss. In this talk, the recent measurements of the production of D*, D0 and D+ mesons in Pb-Pb collisions at sNN= 5.02 TeV performed with the ALICE detector will be presented. The measurement of D-meson RAA and v2 for different centrality classes will be shown and compared to the theoretical model prediction.
        Speaker: syaefudin jaelani (Utrecht University)
        Slides
    • Neutrino physics 301B

      301B

      China National Convention Center

      • 88
        NEXT: Searching for the neutrino-less double beta decay at the LSC
        The goal of the NEXT (Neutrino Experiment with a Xenon TPC) collaboration is the sensitive search of the neutrino-less double beta decay (ββ0ν) of 136Xe at the Laboratorio Subterraneo de Canfranc (LSC). The observation of such a lepton-number-violation process would prove the Majorana nature of neutrinos, providing also handles for an eventual measurement of the neutrino absolute mass. After a successful R&D phase, a first large-scale prototype of a high-pressure gas-Xenon electroluminescent TPC (NEW) is being operated at LSC since 2016. NEW is a 10-kg radiopure detector meant to understand the relevant backgrounds for the ββ0ν search and to perform a measurement of the two neutrino mode of the double beta decay (ββ2ν). The first phase of NEW physics program has consisted of the commissioning of the detector and the data taking with calibration sources (83Kr, 22Na and 56Co, which has allowed to understand the detector capabilities in terms of energy resolution (below 1% at 3 MeV) and event topology reconstruction. The operation of NEW is setting the grounds for the construction of the NEXT-100 detector: a TPC holding 100 kg of 136Xe and reaching a sensitivity to the ββ0ν half-life of 6x1025y after 3 years of data taking. In this talk, the latest results of the NEW detector as well as the status of the NEXT-100 project will be presented.
        Speaker: Pau Novella (IFIC)
        Slides
      • 89
        The latest T2K neutrino oscillation results
        T2K is a long-baseline neutrino oscillation experiment taking data since 2010. A neutrino beam is produced at the J-PARC accelerator in Japan and is sampled at a Near Detector complex 280 m from the neutrino production point and at the far detector, Super-Kamiokande. Beams predominantly composed of muon neutrinos or muon anti-neutrinos have been produced by changing the currents in the magnetic focusing horns. The additional neutrino-mode data collected with T2K in 2017 have doubled the statistics relative to previous analysis releases. This presentation will show the most recent T2K oscillation results obtained from a combined analysis of the entire available data set in the muon neutrino and muon anti-neutrino disappearance channels, and in the electron neutrino and electron anti-neutrino appearance channels. Using these data, we measure four oscillations parameters: sinθ23, sinθ13, |Δm232| and δCP, as well as the mass ordering.
        Speaker: Xianguo Lu (University of Oxford)
        Slides
      • 90
        Neutrino-less double beta decay study in the CANDLES experiment
        Neutrino-less double beta decay is one of the hottest topics in the particle physics, since it could probe long-searched neutrino-mass and its hierarchy, also could confirm that neutrino is Majorana particle. The decay is extremely rare, thus an experiment must have ultimately low background environment. 48Ca has the largest Q value (4.3 MeV) among double beta decay nuclei, which is even much higher than that of most of environmental radio-impurities. Therefore, zero-background condition could be achieved. The CANDLES III+ experiment consists 305 kg of CaF2 in 96 crystals, where 350 g of 48Ca are contained. The active veto of liquid scintillator effectively suppresses both the external and internal background by providing pulse shape difference. In the recent couple of years, the experiment has upgraded with the cooling system and the geomagnetic compensation coils toward higher light yield and energy resolution. The passive shield made of lead blocks (7 to 12 cm thick) and the boron sheets (5 mm thick) have also been installed in order to suppress high energy gamma rays originated from the surrounding rock and metal materials by two orders of magnitude. Continuous data acquisition for searching neutrino-less double beta decay using the all the planned upgrades has started since June, 2016. In this talk, recent experiment status and performance and the studies for neutrino-less double beta decay search will be reported.
        Speaker: Yasuhiro Takemoto (Osaka University)
        Slides
      • 91
        Recent results from Borexino and prospects for the SOX project
        The Borexino experiment, located at the Gran Sasso Laboratory in Italy, is operational since 2007. The unprecedented ultra-low background of the inner scintillating core has allowed to measure the fluxes of different components of the solar neutrino spectrum for the first time, thus probing both solar neutrino oscillations and the Standard Solar Model. We present the newest results on solar neutrinos obtained with Borexino Phase-II data. Furthermore, we discuss the prospects for the SOX project, which will start at the beginning of 2018 and it will be able to test the long-standing issue of the existence of a sterile neutrino.
        Speaker: Laura Collica (I)
        Slides
      • 92
        Search for eV Sterile Neutrinos – The Stereo Experiment
        In the recent years, major milestones in neutrino physics were accomplished at nuclear reactors: the smallest neutrino mixing angle θ13 was determined with high precision and the emitted antineutrino spectrum was measured at unprecedented resolution. However, two anomalies, the first one related to the absolute flux and the second one to the spectral shape, have yet to be solved. The flux anomaly is known as the Reactor Antineutrino Anomaly and could be caused by the existence of a light sterile neutrino eigenstate participating in the neutrino oscillation phenomenon. Introducing a sterile state implies the presence of a fourth mass eigenstate, while global fits favor oscillation parameters around sin22θnew=0.09 and Δm2new=1.8 eV2. The Stereo experiment was built to finally solve this puzzle. It is one of the first running experiments built to search for eV sterile neutrinos and takes data since end of 2016 at ILL Grenoble (France). At a short baseline of 10 meters, it measures the antineutrino flux and spectrum emitted by a compact research reactor. The segmentation of the detector in six target cells allows for independent measurements of the neutrino spectrum at multiple baselines. An active-sterile flavor oscillation could be unambiguously detected, as it distorts the spectral shape of each cell’s measurement differently. This presentation will give an overview on the Stereo experiment, along with details on the detector design, detection principle and the current status of data analysis.
        Speaker: Victor HELAINE (Laboratoire de Physique Saubatomique et Cosmologie, CNRS/IN2P3)
        Transparents
    • Standard model physics at the TeV scale 305

      305

      China National Convention Center

      • 93
        EW production at LHCb
        LHCb, while purpose built for b-physics, also functions as a general purpose forward detector, covering the pseudo-rapidity range 2.0 to 5.0. We present the latest measurements of W and Z boson production. These benchmark measurements are used to constrain the parton distribution functions that describe the inner structure of the proton, and to test the modelling of Standard Model processes. These measurements can also be used to validate reconstruction techniques.
        Speaker: Yin Hang (CCNU)
        Slides
      • 94
        Heavy flavour production measurements at LHCb
        Heavy flavour production measurements in proton-proton collisions are important tests of QCD. We report on updated production cross-section measurement of quarkonia, open-charm, and open-beauty states. Other aspects related to the quarkonium production mechanisms, such as the production of charmonium state in jets, will be discussed.
        Speaker: Dr Sergey Barsuk (LAL, Orsay)
        Slides
      • 95
        Latest CMS results on ttH(bb) searches
        Latest 13 TeV results of CMS searches for the Higgs boson produced in association with top quarks and decaying to b quarks will be presented. This talk will focus on the semi-leptonic and di-leptonic channels with the matrix element method, BDT and DNN discriminants.
        Speaker: Wuming Luo
        Slides
      • 96
        Tau Identification at CMS in LHC Run-2
        Since Run-1 of the LHC, CMS has taken the opportunity to improve further particle reconstruction. A number of improvements were made to the Hadronic Tau reconstruction and Identification algorithms. In particular, electromagnetic strip reconstruction of the Hadron plus Strips (HPS) algorithm was improved to better model signal of pi0 from tau decays. This modification improves energy response and removes the tau footprint from isolation area. In addition to this, improvement to discriminators combining isolation and tau life time variables, and anti-electron in MultiVariate Analysis technique was also developed. The results of these improvements using 13 TeV data at LHC Run-2 are presented and validation of Tau Identification using a variety of techniques is shown.
        Speaker: Somnath Choudhury
        Slides
    • Coffee Break + Poster session The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 97
        1. Thermodynamics of Quark-Gluon Plasma Media in Quark-Like Model
        Speaker: Mohammad Ghanaatian (P)
      • 98
        2. Study of the Higgs boson properties by combining different production and decay channels.
        Speaker: Kunlin RAN (Beijing)
        Poster
      • 99
        3. Development of a fast avalanche-photodiode detector system with nanosecond time resolution for X-ray
        Speaker: 李贞杰 (高能所)
      • 100
        4. EW tests and BSM searches in B physics with the ATLAS detector
        Speaker: Javier Llorente Merino
      • 101
        18. Excited Omega_c states from QCD sum rules
        In the past years important experimental progresses have been made in the field of charmed baryons, while their theoretical studies are also important. We use the method of QCD sum rule to study mass spectra and decay properties of excited heavy baryons in the framework of heavy quark effective theory. Especially, we pay attention to the five excited Omega_c states, which were recently observed in the LHC experiment.
        Speaker: Dr Hua-Xing Chen (Beihang University)
      • 102
        5. Measurement of jet production with the ATLAS detector and extraction of the strong coupling constant
        Speaker: Javier Llorente Merino
        Slides
      • 103
        12. LHASSO detector
        Speaker: Bo Gao (高能所)
        Poster
      • 104
        7. Masses of Charmed and Bottom Tetraquarks in the Relativistic Quark Model
        Heavy tetraquark states are studied within the diquark-antidiquark picture in the framework of a simple relativistic constituent quark model. We solve the Dirac equation of two-body systems by using an appropriate Ansatz. Considering hyperfine spin-isospin interaction, we predict the masses of the scalar diquarks and of the open and hidden charmed and bottom scalar tetraquarks. Our results indicate the scalar resonances D_0^* (2400) and D_s^ (2632) have a sizable tetraquark amount in their wave function, while it turns out the scalar states D_s0^* (2317) and X(3915) should not be considered as being predominately diquark-antidiquark bound states.
        Speaker: Zahra Ghalenovi (K)
        Slides
      • 105
        13. Status of JUNO
        Speaker: WANG Yaoguang (高能所)
        Poster
      • 106
        8. Photoproduction of doubly heavy baryon at the LHeC
        Speaker: Samuel Owusu (USTC)
      • 107
        16. Detector performance and physics potential at CEPC
        Speaker: 浩 梁 (中国原子能科学研究院)
        Poster
      • 108
        9. Searches for supersymmetry in resonance production, R-parity violating signatures and events with long-lived particles with the ATLAS detector
        Speaker: Yang LIU Yang (Beijing)
        Poster
      • 109
        10. Search for the 125 GeV Higgs boson in the ttH production mode with the ATLAS detector
        Speaker: Shuyang HU (Shanghai)
        Slides
      • 110
        15. Measurement of Ds semi-leptonic decays of Ds+ -> K0bar(*) e+ nu at BESIII
        Speaker: Mr Yu Zhang (University of Chinese Academy of Sciences)
        Slides
      • 111
        11. Search for di-Higgs production with the ATLAS detector
        Speaker: Maosen ZHOU (IHEP)
        Slides
      • 112
        14. Study of the cross sections of e+ e- -> pi+ D0 D*- above 4 GeV at BESIII
        Speaker: 颖锐 侯 (University of Chinese Academy of Sciences)
        Slides
      • 113
        17. Hard X-ray Modulation Telescope (HXMT) "Insight"
        Speaker: Mr Qianqing 尹倩青 (高能所)
      • 114
        6. Study of the Deuteron System in the Hypercentral Approach
        Speaker: Zahra Ghalenovi (Kosar Univerity of Bonord)
        Slides
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 115
        Hot and dense matter physics: Theory
        Speaker: Prof. Pengfei Zhuang (THU)
        Slides
      • 116
        Hot and dense matter physics: Experiment
        Speaker: Prof. Johanna Stachel (Univ. of Heidelberg)
        Slides
      • 117
        Hadrons in medium
        Speaker: Prof. Hirokazu Tamura (Department of Physics, Tohoku University)
        Slides
    • 10:15 AM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 118
        Hadron spectroscopy: Experiment
        Speaker: 成平 沈 (北航)
        Slides
      • 119
        Hadron spectroscopy: Theory
        Speaker: Dr Christoph Hanhart (IAS, Forschungszentrum Juelich, Germany)
        Slides
      • 120
        Hadron spectroscopy: LQCD
        Speaker: Dr Christopher Thomas (Cambridge U., DAMTP)
        Slides
      • 121
        Measurement of the Weak Charge of the Proton by the QWeak Collaboration
        The QWeak collaboration has un-blinded its final result from data taken at Jefferson Laboratory. We describe the longitudinally polarized electron-proton elastic scattering technique employed to isolate and extract the scattering asymmetry, which constituted our observable. The precision obtained from our combined two run periods was ±9 ppb. The results from these run periods were in excellent agreement. Some of the backgrounds and corrections applied in the measurement will be discussed. We provide the results from several methods used to extract consistent values of the proton's weak charge Qp W from our measurement. From the proton's weak charge is obtained a result for sin2qW at the low Q2 scale of the measurement, which is a sensitive Standard Model test of the running of sin2qW. This defines a mass reach for any parity violating semi-leptonic physics beyond the Standard Model. Implications for specific physics models will be discussed. We also present results for the strange and axial form factors obtained from a fit which included additional existing parity-violating electron scattering data. In conjunction with existing atomic parity violation results on 133Cs we also extract the vector weak quark couplings C1u and C1d. The latter are combined to obtain the neutron's weak charge. ....... This work was supported by DOE Contract No. DEAC05-06OR23177, under which Jefferson Science Associates, LLC operates Thomas Jefferson National Accelerator Facility. Construction and operating funding for the experiment was provided through the U.S. Department of Energy (DOE), the Natural Sciences and Engineering Research Council of Canada (NSERC), and the National Science Foundation (NSF) with university contributions from the College of Willi
        Speaker: Roger Carlini (J)
        Slides
    • 12:45 PM
      Lunch Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Dark matter and cosmology 301B

      301B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 123
        Status and prospects of CJPL and CDEX dark matter experiment
        China Jinping underground laboratory (CJPL) is the deepest laboratory in the world and an ideal site for experiments on particle physics, astrophysics and other low background experiments. It is located in the Jinping Mountain near Xichang city, southwest China, with an overburden of about 2400m rock. The status of CJPL-I laboratory and progress of new CJPL-II project will be described. The China Dark Matter Experiment (CDEX) pursues direct searches of light Weakly Interacting Massive Particles (WIMPs) at CJPL with p-type point-contact germanium(pPCGe) detectors. Results on light WIMPs from CDEX-1 and CDEX-10 phase, with a germanium crystal mass of ~1kg and 10kg pPCGe detectors respectively, will be presented. The evolution of CDEX into target of CDEX-1T Experiment with ton-scale germanium detector array, aiming at both Dark Matter and Neutrinoless Double Beta Decay, will also be introduced.
        Speaker: Hao Ma (Tsinghua University)
        Slides
      • 124
        Searching for Dark Matter with LUX and LUX-ZEPLIN
        The identification of dark matter is presently one of the greatest challenges in science, fundamental to our understanding of the Universe. Weakly Interacting Massive Particles (WIMPs) that arise naturally in several models of physics beyond the Standard Model are compelling candidates for dark matter. The Large Underground Xenon (LUX), operated at the Sanford Underground Research Facility under Lead, South Dakota (USA), is a dual phase xenon time projection chamber with 250 kg of active mass. Based on an exposure of 3.35×10^4 kg.day, it has the world leading spin-independent exclusion limit over a wide range of WIMP masses allowing to exclude cross sections above 1.1×10^-46 cm^2 for a WIMP mass of 50 GeV/c^2 (90 % CL). For spin-dependent interactions, cross sections above 1.6×10^-41 cm^2 and 5×10^-40 cm^2 are also excluded for for a WIMP mass of 35 GeV/c^2 (90 %CL) for neutron and protons interactions, respectively. The innovative use of 83mKr and CH3T sources dissolved in the xenon and a collimated beam of mono-energetic 2.45 MeV neutrons from a DD generator to calibrate the detector for electron and nuclear recoils respectively played a key role in achieving this unprecedented sensitivity. LUX-ZEPLIN (LZ) is a second-generation dark matter experiment, successor of LUX, featuring a 7-tonne active liquid xenon target (from a total of 10 tons of xenon) that will run in the same installations as LUX. Its current projected sensitivity is 2.3x10^-48 cm^2 for a WIMP mass of 40 GeV/c^2 and 5.6 tons fiducial mass with 1000 live-days of data taking, covering a substantial range of theoretically motivated dark matter candidates. In this talk, we will present the last results of LUX, emphasizing the advances in the detector calibration and data analysis, followed by an overview of the LZ detector design, planned program, current project status and timeline.
        Speaker: Isabel Lopes (LIP, University of Coimbra)
        Slides
      • 125
        Dark Photon search with PADME at LNF
        Dark Matter elusiveness could be explained by speculating that it lives in a separate sector with respect to the Standard Model (SM) and that interacts with it only by means of messengers. The simplest model foresees just one messenger: a, possibly massive, vector boson given by a new U(1) symmetry. This mediator can faintly mix with the photon and, hence, interact with SM charged particles, seeing an effective charge equal to $\varepsilon e$, with $e$ SM charge. The PADME experiment, hosted at Laboratori Nazionali di Frascati, is designed to search for such kind of particle, looking for its production in $e^{+}\,e^{-}$ annihilations. Exploiting the DA$\Phi$NE linac, the collaboration aims to collect $10^{13}$ positrons on target by the end of 2018, reaching a sensitivity of $\sim10^{-3}$ for masses up to $23.7\,\mbox{MeV}$.
        Speaker: Dr Gabriele Piperno
        Slides
    • Development of accelerators and detectors 301A

      301A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 126
        The Belle II Experiment: status and physics program
        The Belle II experiment is now under construction at the KEK laboratory in Japan. This project represents a substantial upgrade to both the Belle detector and the KEKB accelerator. The Belle II experiment will record 50/ab of data, a factor of 50 more than that recorded by Belle. This large data set, combined with the low backgrounds and high trigger efficiencies characteristic of an e^+e^- experiment, should provide unprecedented sensitivity to new physics signatures in B and D meson decays, and in tau lepton decays. The detector comprises many forefront subsystems. The vertex detector consists of two inner layers of silicon DEPFET pixels and four outer layers of double-sided silicon strips. These layers surround a beryllium beam pipe having a radius of only 10 mm. Outside of the vertex detector is a large-radius, small-cell drift chamber that provides high resolution tracking in a 1.5 T magnetic field. Surrounding this is a state-of-the-art particle-identification detector: the barrel region consists of long quartz bars within which cherenkov photons are radiated. A system of spherical mirrors focuses this light onto finely segmented multi-channel-plate phototubes providing <100 ps timing resolution. The forward endcap region consists of a ring-imaging cherenkov counter (RICH) based on silicon aerogel with a varying index of refraction. Outside of these detectors is a CsI crystal calorimeter with waveform sampling, and outside of this is iron shielding (serving as the magnet yoke) instrumented with scintillating fiber detectors and glass resistive plate chambers in order to identify muons. The experiment is scheduled to begin physics running in 2018.
        Speaker: Jake Bennett
        Slides
      • 127
        MWPC prototyping and testing for STAR Inner TPC upgrade
        STAR experiment at RHIC is upgrading the inner sectors of the STAR Time Projection Chamber (iTPC) to increase the segmentation on the inner padplane from 13 to 40 rows and to replace the inner sector Multi Wire Proportional Chamber. The upgrade will provide better momentum resolution, better dE/dx resolution, and most importantly it will provide improved acceptance at high rapidity to |η| ≤ 1.5 compared to the current TPC limitation of |η| ≤ 1.The enhanced measurement capabilities of STAR-iTPC upgrade are critical to physics program of the Beam Energy Scan II at RHIC during 2019-2020, in particular the QCD phase transition study.In this talk, the iTPC MWPC module fabrication and prototype testing results will be discussed.
        Speaker: Shuai Wang
        Slides
      • 128
        The new Cylindrical GEM Inner Tracker of BESIII
        The CGEM-IT (Cylindrical GEM - Inner Tracker) is the upgrade of the internal tracking system of the BESIII experiment, running at BEPCII in Beijing, China. The subdetector is currently under construction and its installation in the spectrometer is foreseen in 2018, after a final verification that its performance matches the BESIII requirements. The layout consists of three layers of cylindrically-shaped triple GEMs, with some important innovations with respect to the existing GEM detectors, in order to achieve the best performance with the lowest material budget. It will be the first cylindrical GEM running with analog readout inside a 1T magnetic field. The analog readout provides the simultaneous measurement of both the deposited charge and the signal time. Thanks to this, the CGEM-IT reconstruction will use a combination of two algorithms to evaluate the spatial position of the charged tracks inside its volume: the charge centroid and the micro time projection chamber. The two modes are complementary and can cope with the asymmetry of the electron avalanche when running in magnetic field and with non-orthogonal incident tracks. Both planar chambers and the first cylindrical layer prototype have been tested during various test beams on the H4 line of SPS (CERN) with muons and pions of momentum = 150 GeV/c, to evaluate their behaviour under different working settings. The efficiencies and resolutions obtained with the two modes will be shown as well as a comparison between the planar and cylindrical chambers.
        Speaker: Lia Lavezzi (高能所)
        Slides
      • 129
        LHAASO-KM2A detector
        Speaker: Dr xiangdong 盛祥东 (IHEP)
        Slides
      • 130
        An introduction to LHAASO-WCDA detector
        Speaker: Bo Gao (高能所)
        Slides
    • Flavor physics - CKM and beyond 305

      305

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 131
        COMET, an experiment to search for mu-e conversion in a nuclear field.
        Charged lepton flavor violating (CLFV) process is predicted to be out of experimental reach by the Standard Model of elementary particle physics (SM). However, many models of the new physics beyond the SM predicts that it is just below the current experimental limit. COMET searches for one of the CLFV process, mu-e conversion in a nuclear field, improving the sensitivity by a factor of approximately 10^2 for Phase-I and 10^4 for Phase-II experiment from a past experiment. Overview of the experiment and recent status will be presented.
        Speaker: Hiroaki Natori (I)
        Slides
      • 132
        Study of the Lorentz structure of $\tau$ decays from Belle
        We evaluate the Michel parameters of $\tau$ decays using the full data sample of Belle. This is important to reveal the Lorentz structure of $\tau$ leptonic decays, which includes not only the $V - A$ interaction but also contributions from scalar, tensor and others that may arise from New Physics, thus testing lepton universality as well. We use both $\tau^+ \to l^+ \nu \bar{\nu}$ and $\tau^+ \to l^+ \gamma \nu \bar{\nu}$. We also measure branching fractions of $\tau$ decays into three charged leptons and two neutrinos. From this, we can constrain Michel-like parameters.
        Speaker: Junya Sasaki (Univ. of Tokyo)
        Slides
      • 133
        Search for K+to pi+ nu nu, and future searches for exotic processes
        K->pinunu is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the K+->pi+nunu decay with 10% precision. NA62 took data in 2015 and 2016 reaching the Standard Model sensitivity. Recent results and prospects will be presented.
        Speaker: Michele Corvino
        Slides
      • 134
        Charm meson physics at BESIII
        BESIII Collaboration has accumulated the world's largest e+e- collision samples at Ecm = 3.773, 4.009, 4.18 GeV. From analyses of pure leptonic decay D(s)+ -> l+v (l=mu or tau), semileptonic decays of D -> K(pi)l+v (l=e or mu), D+ -> K-pi+e+v, D+ -> omega e+v, D0(+) -> f0(980)e+v, Ds+ -> eta(')e+v, and Ds+ to eta(')e+v, we report the determinations of their absolute branching fractions, CKM matrix elements |Vcs(d)|, the D(s)+ decay constants, the form factors of D semi-leptonic decays. These are important to calibrate the LQCD calculations of decay constants and form factors and to test the CKM unitarity. we have performed an amplitude analysis of D0 -> K-pi+pi+pi-, and have measured the asymetries of D+ -> K_S/LK+(pi0) and D0 -> K_S/Lpi0(pi0), as well as the branching fractions for D0(+) -> PP and some decays containing two KSs. In addition, we also measure the branching fractions for Ds+ -> omega pi+, omega K+ and bayon decay of pn.
        Speaker: Lei Li (BIPT)
        Slides
      • 135
        Lambda_c physics at BESIII
        In 2014. BESIII collected a data sample of 567 pb-1 at Ecm = 4.6 GeV, which is just above the Lambda_c+ pair production threshold. By analyzing this data sample, we have measured the absolute branching fractions for many decays of Lambda+c for the first time. These decays include the semileptonic decays of Lambda e+v, Lambda mu+v, the hadronic decays of pKs, pK-pi+, pK-pi+pi0, Lambda pi+, Lambda pi+pi0, Sigma+pi+pi0, pKspi0, Lambda pi+pi+pi-, pKspi+pi-, Sigma0pi+, Sigma+pi0, Sigma+omega, pphi, pK+K-|non-phi, ppi+pi-, nKspi+, Sigma-pi+pi+(pi0) and inclusive decay Lambda+anything. The decays of ppi+pi-, nKspi+ and Sigma-pi+pi+pi0 are observed for the first time and the others are measured with significantly improved precision. These results are important to benifit the development of the related theories, and provide important inputs for both charmed baryons and B physics.
        Speaker: Giulio Mezzadri (INFN-Ferrara)
        Slides
    • Hadron spectroscopy and exotics 303B

      303B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 136
        A study of $d^*(2380)$
        $d^*(2380)$ as a new dibaryon resonance was observed by WASW@COSY experiments~\cite{Clement} recently. This discovery has triggered a great interest to understand its intrinsic structure. In this talk, a theoretical study of this new dibaryon with the help of the constituent chiral quark model is briefly summarized. It is found that our approach could reasonable reproduce the mass of $d^*$ in the coupled channel with $\Delta\Delta+CC$ (C-hidden color component)~\cite{Yuan,Huang}. The obtained wave function for $d^*(2380)$ shows that the system is a compact one and the probabilities are about 2/3 for the $CC$ component and 1/3 for the $\Delta\Delta$ component, respectively. This wave function is applied for the calculation of its partial decays, like double pion decay modes of $d^*(2380)\to d\pi^0\pi^0$, $d\pi^+\pi^-$~\cite{Dong1}, $pn\pi^0\pi^0$, $pn\pi^+\pi^-$~\cite{Dong2}, and single pion decay mode of $pn \pi$~\cite{Dong3}. Our calculated double pion decay widths are in excellent agreement with the experiments~\cite{Clement1}. The single pion decay width is also compatable with the experimental measurement. It is again supported our compact hexaquark dominanted picture.In addition, the charge distribution of $d^*(2380)$, as another physical quantity to distinguish its structure, is also proposed and discussed~\cite{Dong4}.
        Speaker: Prof. Yubing Dong (Institute of High Energy Physics, Chinese Academy of Sciences, P. R. China)
        Slides
      • 137
        Shedding light on Hexaquarks
        Several new findings in the four, five and six quark systems reheat the interest in the field of multiquark states (beyond trivial $q\bar q$ and qqq). A lot of progress has recently been made in the 6q sector, on both the theoretical and experimental side. A resonance like structure observed in double-pionic fusion to the deuteron, at M=2.38 GeV with $\Gamma =70$ MeV and $I(J^P )=0(3^+)$ has been consistently observed in a wealth of reaction channels, supporting the existence of a resonant dibaryon state - the $d^* (2380)$. These studies include measurement of all the principle strong decay channels in pn collisions in the quasi-free mode by the WASA-at-COSY and HADES collaborations. The internal structure of the $d^* (2380)$ is largely unknown. It can contain various hidden color 6q configurations, $\Delta\Delta$ molecular states with angular momentum L=0,2,4,6 as well as meson-assisted dressed dibaryon structures. The large set of experimental data obtained to date gives some constraints on the internal structure of the $d^* (2380)$ dibaryon, but does not settle the issue. The $d^*$ is the only multiquark state which can be produced copiously at current facilities, offering unique access to information beyond its basic quantum numbers, particularly its physical size and internal structure. The first exciting new results on $d^*$ photoproduction from A2-MAINZ/MAMI will be reported together with the latest results from Wasa-at-Cosy on $d^*$ rare decays. Future plans to improve our understanding of the d* will also be presented, including the exciting possibilities for investigation of the SU(3) multiplet companions and mirror partners of the $d^*$.
        Speaker: Dr Mikhail Bashkanov (University of Edinburgh)
        Slides
      • 138
        Nucleon resonances in the photoproduction gamma p --> Lambda K*
        The high-precision cross-section data for the reaction $\gamma p \to K^{*+}\Lambda$ reported by the CLAS Collaboration at the Jefferson Laboratory have been analysed based on an effective Lagrangian approach in the tree-level Born approximation. Apart from the $t$-channel $K$, $\kappa$, $K^*$ exchanges, the $s$-channel nucleon ($N$) exchange, the $u$-channel $\Lambda$, $\Sigma$, $\Sigma^*(1385)$ exchanges, and the generalized contact term, the contributions from the near-threshold nucleon resonances in the $s$-channel are also taken into account in constructing the reaction amplitudes. It is found that to get a satisfactory description of the differential cross section data, at least two nucleon resonances should be included in the $s$-channel interaction diagrams. By including the $N(2060){5/2}^-$ resonance, which is responsible for the shape of the angular distribution near the $K^*\Lambda$ threshold, and one of the $N(2000){5/2}^+$, $N(2040){3/2}^+$, $N(2100){1/2}^+$, $N(2120){3/2}^-$ and $N(2190){7/2}^-$ resonances, one gets fits that describe the cross-section data quite well, with the fitted resonance masses and widths compatible with those advocated by the Particle Data Group (PDG). The resulted predictions of the beam, target, and recoil asymmetries are found to be quite different from various fits, indicting the necessity of data on those spin observables for $\gamma p \to K^{*+}\Lambda$ to further pin down the resonance contents and parameters in this reaction.
        Speaker: Dr Fei Huang (University of Chinese Academy of Sciences)
        Slides
      • 139
        Study of strange and heavy flavor baryons in a hypercentral quark Model
        Speaker: GHALENOVI Zahra
        Slides
    • Hadrons in medium - hyperons and mesons in nuclear matter 302B

      302B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 140
        AMADEUS experiment: Studies on antikaon interactions with nucleons and nuclei
        The understanding of the low-energy strong interaction involving strangeness is a challenging topic due to strongly debated resonances and predicted kaonic nuclear bound states. Important experimental information on the interactions of antikaons with nucleons and nuclei is still missing. These questions are also related to the role of strangeness in neutron stars. The K- nucleon interaction is strongly attractive at low energies verified in kaonic hydrogen studied in the SIDDHARTA experiment at the DAΦNE electron-positron collider of LNF-INFN (Frascati/Italy). Hyperon resonances like the elusive Λ(1405) in the s-wave impose questions about its nature. According to recent theoretical studies it can be described as a dynamically generated resonance with two poles. Other studies claim that Λ(1405) is a quasi-bound state K-p, which could lead to kaonic nuclear bound states with multiple nucleons like the prototype system K-pp which is searched in different experiments. An insight in many open facets of the antikaon interactions can be provided by the AMADEUS experiment at DAΦNE based on the KLOE detector. As a first step data from antikaon-induced reactions in the drift chamber of KLOE were analyzed and yielded new results on antikaon absorption on nuclei. The physics topics of the planned AMADEUS project will have a wide range from (anti)kaon scattering in the unexplored low momentum region to studies of absorption processes taking advantage of the low-energy kaon source provided by DAΦNE and the KLOE 4π-detector system for neutral and charged particles. Recent results of the experimental studies and an outlook to the future possibilities within AMADEUS will be presented.
        Speaker: Johann Marton (Stefan Meyer Institute, Austrian academy of Sciences)
        Slides
      • 141
        THE ELECTROMAGNETIC RESPONSE OF RESONANCE MATTER AND OTHER STRANGE OBSERVATIONS
        The matter formed in central heavy-ion collisions at a few GeV per nucleon is commonly understood as resonance matter, a gas of nucleons and excited baryonic states with a substantial contribution from mesonic, mostly pionic excitations. Yet, in the initial phase of the reaction the system is compressed to beyond nuclear ground state density and hence substantial modifications of the hadron properties are expected to occur. It is conjectured that at high enough densities hadronic degrees of freedom would finally disappear and a chirally restored phase of quarks would appear. In this talk we present key results on in-medium properties of hadrons obtained by the High Acceptance DiElectron Spectrometer. The spectral distribution of virtual photon emitted from the collision zone of A+A collisions indicates strong medium effects beyond those resulting from a pure superposition of frequent but individual NN collisions. This observable, as well as the measured hadron abundances in the final state show features of a thermalized fireball. Baryon-driven medium effects influence significantly the rho meson in-medium spectral function and are considered essential in describing the low-mass dilepton spectra. While the measured abundance of all reconstructed particles are well described assuming thermalization, the double strange cascade Ξ(1321) production in A+A and p+A collisions shows however a sizeable enhancement above predictions of statistical hadronisation and transport model calculations. A deeper understanding of the microscopic properties of resonance matter requires systematic investigations of baryonic decays and these are studied in HADES making use of pion beams. This experimental program will be continued in the coming years with an upgraded HADES detector.
        Speaker: Tetyana Galatyuk (T)
        Slides
      • 142
        The Compressed Baryonic Matter experiment at FAIR
        The Compressed Baryonic Matter (CBM) experiment will be one of the major scientific pillars of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. The goal of the CBM research program is to explore the QCD phase diagram in the region of high baryon densities using high-energy nucleus-nucleus collisions. This includes the study of the equation-of-state of nuclear matter at neutron star core densities, and the search for the deconfinement and chiral phase transitions. The CBM detector is designed to measure rare diagnostic probes such as hadrons including multi-strange (anti-) hyperons, lepton pairs, and charmed particles with unprecedented precision and statistics. Most of these particles will be studied for the first time in the FAIR energy range. In order to achieve the required precision, the measurements will be performed at very high reaction rates of 1 to 10 MHz. This requires very fast and radiation-hard detectors, a novel data read-out and analysis concept based on free streaming front-end electronics, and a high-performance computing cluster for online event selection. The status of FAIR and the physics program of the proposed CBM experiment will be discussed.
        Speaker: Joachim Stroth (GSI)
        Slides
      • 143
        Measurement of the transverse polarization of Lambda/anti-Lambda and di-hadron cross sections at Belle
        Spontaneous hyperon polarization has been a long standing issue since it was first observed in pp scattering more than 40 years ago. The so called polarizing Fragmentation Function(FF), $D^{\perp}{1T}(z, p^2{\perp}),describestheproductionofatransverselypolarizedhadronfromanunpolarizedquark,wherezdenotesthefractionalenergyofthehadronandp_\perpthetransversemomentumwithrespecttothefragmentingquark.ThepolarizingFFcanbedeterminedbymeasurementofthetransversepolarizationofhyperons.Duetoitschiral−evennature,thesignofthisFFcanbeunambiguouslydeterminedine+e−annihilationandthecomparisonoftheextractedFFtootherprocesses,likeSIDIS,providesauniqueopportunitytotestitsuniversality.TheknowledgeofpolarizingFFwillalsohelptoextendourunderstandingoffactorizationinQCDprocesseswithunintegrateddependencesonintrinsictransversemomenta.Thelargee+e−annihilationdatasamplecollectedbytheBelleexperimentattheKEKBstorageringallowsaprecisionstudyontheproductionoftransverselypolarizedhyperons\Lambda/anti−{\Lambda}transversetoitsproductionplaneine+e−annihilationinclusiveprocess,studiesonbothcasesofwithandwithoutalighthadrontotagtheflavorofthequarkfragmentingtothe\Lambdawillbepresented.Thefeed−downfrom\Sigma^0and\Lambda_c$ decays are also investigated. Further, this talk will discuss the recent results on the identified di-hadron cross-sections measured at Belle, which are an essential ingredient in the extraction of transversity from a global fit to di-hadron single spin asymmetries.
        Speaker: Ms Yinghui GUAN (IHEP)
        Slides
      • 144
        Quasi-bound state in the antiKNNN system
        An exotic system consisting of an antikaon and three nucleons will be considered. A search of a quasi-bound state in the system will be performed using four-body Faddeev-type equations. Different K¯N potentials will be used for studying dependence of the results on the two-body input.
        Speaker: Nina Shevchenko (Nuclear Physics Institue Rez)
        Slides
    • Hot and dense matter physics (QGP and heavy ion collision) 303A

      303A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 145
        Constraining the properties of the Quark-Gluon Plasma with anisotropic flow measurements in ALICE
        The primary goal of the ultra-relativistic heavy-ion collision program at the Large Hadron Collider (LHC) is to study the properties of the Quark-Gluon Plasma (QGP), a novel state of strongly interacting matter that is proposed to exist at high temperatures and energy densities. Studies of azimuthal correlations of produced particles have contributed significantly to the characterization of the matter created in heavy-ion collisions. Anisotropic flow, which quantifies the anisotropy of the momentum distribution of final state particles, is sensitive to the event-by-event fluctuating initial geometry of the overlap region, together with the transport properties and the equation of state of the system. The successful description of the measured anisotropic flow coefficients by hydrodynamic calculations suggests that the created medium behaves as a nearly perfect fluid with a shear viscosity to entropy density ratio close to a conjectured lower bound 1/4π. In this talk, we will present flow measurements in Pb--Pb collisions at sNN‾‾‾‾√= 2.76 and 5.02 TeV with ALICE at the LHC. The standard anisotropic flow coefficients, as well as the recently developed anisotropic flow observables, symmetric cumulants and non-linear modes of higher order anisotropic flow, will be discussed in detail [1, 2]. These measurements, together with the comparisons to hydrodynamic calculations, help constrain the initial conditions and temperature dependence of the shear and bulk viscosities of the QGP, which were not very well constrained by earlier flow measurements. These comparisons could also offer new insights into the geometry of the fluctuating initial state and further understanding of the dynamical evolution of the strongly interacting medium produced in relativistic heavy-ion collisions at the LHC. Reference [1] J.~Adam et al. [ALICE Collaboration], ``Anisotropic flow of charged particles in Pb-Pb collisions at sNN‾‾‾‾√=5.02 TeV,'' Phys. Rev. Lett. 116, 132302 (2016); [2] J.~Adam et al. [ALICE Collaboration], ``Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at sNN‾‾‾√=2.76 TeV,'' Phys. Rev. Lett. 117, 182301 (2016)
        Speaker: You Zhou (Niels Bohr Institute)
        Slides
      • 146
        Measurements of hadron resonance production with ALICE
        Short-lived resonances have been early recognized as good probes to investigate the late-stage evolution of ultra-relativistic heavy-ion collisions. More recently, resonances with different masses and quark composition have provided valuable contributions to the understanding of strangeness production, in particular for the observed multiplicity-dependent enhancement in small systems, and particle production at intermediate transverse momenta. In this light, we will present a comprehensive review of the most recent ALICE results on ρ(770)0, K∗(892)0, ϕ(1020), Σ(1385)±, Λ(1520) and Ξ(1530)0 production in pp, p-Pb and Pb-Pb collisions at various collision energies at the LHC, including results from the latest Pb-Pb run at sNN‾‾‾‾√ = 5.02 TeV. These results, which include centrality- and multiplicity-dependent transverse-momentum spectra, mean transverse momenta, yields, ratios to long-lived hadrons, and nuclear modification factors, will be compared to the results for other hadron species and to predictions from theoretical models.
        Speaker: Enrico Fragiacomo (INFN-Trieste)
        Slides
      • 147
        Strangeness production in pp, p-Pb and Pb-Pb collisions at the LHC energies measured with ALICE
        The main goal of heavy-ion physics is to study the properties of the deconfined state of matter known as the Quark-Gluon Plasma (QGP) created in ultra-relativistic heavy-ion collisions. A systematic study of strangeness production is of fundamental importance for determining the thermal properties of the system created in such collisions. In the central barrel of the ALICE detector, K0s, Λ, Ξ and Ω can be identified reconstructing their weak decay topology. In this talk, the yield and ratios (Λ/K0s and hyperon-to-pion) measured in pp, p-Pb and Pb-Pb collisions will be presented and compared as a function of particle multiplicity. It will be shown that the relative production of strange particles follows a continuous increasing trend from low multiplicity pp to peripheral Pb-Pb collisions, above which a saturation is visible for central Pb-Pb collisions. This increasing trend is similar for pp and p-Pb collisions. Moreover, comparison of strange particle production in pp collisions at two different energies (√s = 7 TeV and 13 TeV) will be used to demonstrate that the observed trend in multiplicity is also energy independent.
        Speaker: Domenico Colella (INFN-Bari)
        Slides
      • 148
        Measurement of open heavy-flavour production in pp and p-Pb collisions with ALICE at the LHC
        Heavy quarks (charm and beauty) are sensitive probes to study the properties of the hot Quark-Gluon Plasma (QGP) produced in high-energy heavy-ion collisions. Due to their large masses, they are produced in the initial state of the collision predominantly by gluon fusion processes, so that they explore the entire evolution of the produced system of strongly interacting matter. The Large Hadron Collider at CERN allows us to study heavy-ion collisions at an unprecedented energy. ALICE, A Large Ion Collider Experiment, is the experiment dedicated to the investigation of heavy-ion collisions. The measurements of heavy-flavour production in pp collisions are important to test predictions from perturbative QCD and provide an essential baseline for the studies in heavy-ion collisions. Differential studies of their production as a function of the multiplicity of charged particles produced in the collision can give insight into multi-parton interaction phenomena, and into the interplay between hard and soft processes. The study of heavy-flavour production in p-Pb collisions is also required to disentangle the influence on particle production of cold nuclear matter effects from those related to the formation of a QGP in Pb-Pb collisions. In this talk, we will present recent open heavy-flavour results from pp collisions at √s= 5.02, 7, 8 and 13 TeV and p-Pb collisions at √sNN = 5.02 TeV, collected with the ALICE detector during the LHC Run-1 and Run-2. The results include the production cross section, nuclear modification factor and multiplicity dependence studies of D mesons and electrons from heavy-flavour hadron decays at mid-rapidity and of muons from heavy-flavour hadron decays at forward rapidity. Charm production was measured down to pT = 0 in pp and p- Pb collisions. Recent measurements of the production cross section of heavy charmed baryons such as Λc (in pp and p-Pb) and Xic (in pp), the first heavy-ion measurements of charmed baryon at the LHC, will also be discussed. The results will be compared with the theoretical model predictions.
        Speaker: Renu Bala (University of Jammu)
        Slides
      • 149
        Measurement of Neutral Mesons and Direct Photons with ALICE at the LHC
        The ALICE experiment is dedicated to the study of the so-called Quark-Gluon Plasma (QGP) which is created in highly energetic heavy-ion collisions. To investigate and understand the properties of this hot and dense partonic medium, the analysis of pp and p-Pb collisions also plays an important role. In this context, one point of general interest is the measurement of direct photons. They can be regarded as an ideal probe to study the QGP since they do not participate in the strong interaction. Hence, they are able to escape the medium unaffected. As photons are created in early partonic collisions and throughout the evolution of the QGP, they provide insights into the different stages of the system. In total, there are two different methods to measure photons in ALICE. One way is to make use of electromagnetic calorimeters and the other possibility is to look for photon conversions which occur within the detector material. Light neutral mesons, namely π0 and η, are reconstructed via their two photon decay channels, for which both methods are used individually as well as in combination, the so-called ``hybrid methods'', which exploit in different ways the respective advantages of the detectors, i.e. the excellent momentum resolution of the conversion photons down to very low transverse momenta and the high reconstruction efficiency of a calorimeter. Therefore, precise measurements of neutral meson production cross sections up to highest transverse momenta of 40~GeV/c can be obtained. They are of high importance for the identification of the decay photons in the context of direct photon measurements. These include not only prompt photons, which are created in early partonic collisions, but also fragmentation as well as thermal photons, which are used to study important aspects of heavy-ion collisions. Moreover, the pp measurements of neutral meson cross sections are used as a reference for p-Pb and Pb-Pb collisions to study parton energy loss mechanisms in the medium. The talk will summarize recent ALICE results of neutral meson and direct photon measurements for pp, p-Pb and Pb-Pb collisions, put them into context and conclude with an overview about the latest status and prospects.
        Speaker: Daniel Mühlheim (Westfälische Wilhelms-Universität Münster)
        Slides
    • Tests of symmetries and conservation laws 302A

      302A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 150
        Hyperfine spectroscopy of (anti)hydrogen for tests of CPT and Lorentz invariance
        The ground-state hyperfine structure (GS-HFS) of hydrogen is known from the hydrogen maser to relative precision of 10–12. It is of great interest to measure the same quantity for its antimatter counterpart, antihydrogen, to test the fundamental CPT symmetry, which states that all particles and antiparticles have exactly equal or exactly opposite properties. Since CPT is strictly conserved in the Standard Model of particle physics, a violation, if found, would point directly to theories behind this framework. The application of the maser technique requires the confinement of the atoms in a matter box for 1000 seconds and is currently not applicable to antihydrogen. Therefore, the ASACUSA collaboration at the Antiproton Decelerator of CERN has built a Rabi-type beam spectroscopy setup for a measurement of GS-HFS. With the initial aim of characterizing the setup devised to measure the GS-HFS and to evaluate its potential, a beam of cold, polarized, monoatomic hydrogen was built and used together with the microwave cavity and sextupole magnet designed for the antihydrogen experiment. The (F,M)=(1,0) to (0,0) transition was measured to a precision of several ppb [1], more than a factor 10 better than in the previous measurement using a hydrogen beam. This result shows that the apparatus developed is capable of making a precise measurement of the GS-HFS of antihydrogen provided a beam of similar characteristics (velocity, polarization, quantum state) becomes available. In a recent publication on the non-minimal Standard Model Extension (SME), describing possible violations of Lorentz and CPT invariance, Kostelecky and Vargas [2] conclude that the in-beam hyperfine measurements of hydrogen alone can be used to constrain certain coefficients of their model, which have never been measured before. The status and prospects of in-beam measurements of hydrogen and antihydrogen will be presented. [1] M. Diermaier et al., arxiv : 1610.06392 [2] V.A. Kostelecky and A.J. Vargas, Physical Review D 92, 056002 (2015).
        Speaker: Eberhard WIDMANN (Stefan Meyer Institute for subatomic Physics)
        Slides
      • 151
        New Muonium Hyperfine Measurement at J-PARC
        MuSEUM is an international collaboration aiming at new precise measurements of the muonium hyperfine structure at J-PARC (Japan Proton Accelerator Research Complex). The new high intensity muon beam that will soon be available at Muon facility will provide an opportunity to improve the precision of these measurements by one order of magnitude. An overview of the different aspects of these new measurements, the current status of the preparation, and the results of commissioning test experiments at zero field are presented.
        Speaker: Nishimura S.
        Slides
      • 152
        Measuring the antimatter fall - The AEgIS experiment
        The study of the (a)symmetry between matter and antimatter is of great interest in modern physics. Recently the antihydrogen 1S-2S levels energy difference has been measured for the first time and compared to that of the hydrogen to test the CPT theorem. Another important aspect about the relation between matter and antimatter is gravity. Even if the general belief is that the Weak Equivalence Principle, also known as the universality of free fall, will stand also for antimatter, no definite tests have been yet performed. The AEgIS experiment aims to measure the effects of the Earth gravitational field on a beam of antihydrogen. The experiment is taking place at the Antiproton Decelerator (AD) at the CERN European Laboratory. The antihydrogen would be produced by the combination of antiprotons, delivered by the AD, and positronium, generated by positrons implantation on a silica target. The measurement strategy is based on the acceleration of the antihydrogen atoms via en electric field gradient and the measurement of the "free fall" by the detection of the annihilations at the end of the flight path. The experimental apparatus, the methods for the production of antihydrogen, for the generation of the beam and for the detection of the annihilations, will be presented along with some preliminary results.
        Speaker: Germano Bonomi (University of Brescia and INFN Pavia)
        Slides
      • 153
        Measurement of Properties of Antihydrogen with the ALPHA Trap
        The ALPHA project at the CERN AD is testing fundamental symmetries between matter and antimatter using trapped antihydrogen atoms. The spectroscopy of the antihydrogen atom may be compared to precisely measured transitions in ordinary hydrogen. CPT conservation, which underpins our current theoretical framework, requires equality of the masses and charges of matter and its antimatter partners, so antihydrogen spectroscopy presents a path to precision CPT tests. In our 2016 run we were able to trap more than 8000 antihydrogen atoms , and they can be held for a 600s laser interrogation time. The 1S-2S transition in antihydrogen has been observed for the first time[1], and it agrees with its hydrogen counterpart within an uncertainty of 400 kHz or 0.2 ppb. The charge of the antihydrogen atom has been bounded below 0.7 10−9 e[2]. New data under analysis is expected to reduce the 100MHz uncertainty in the present PSR hyperfine transition measurement[3] by more than 2 orders of magnitude. These measurements will be described together with their future prospects. [1] M. Ahmadi et al., Nature 541, 506-510 (2017). [2] M. Ahmadi et al., Nature 529, 373-376 (2016). [3] C. Amole et al., Nature 483, 439-443 (2012). ALPHA collaboration: M. Ahmadi, B.X.R. Alves, M. Baquero-Ruiz, W. Bertsche, E. Butler, A. Capra, C. Carruth, C.L. Cesar, M. Charlton, S. Cohen, R. Collister, A.E. Charman, S. Eriksson, A.L. Evans, L.T. Evans, N. Evetts, J. Fajans, T. Friesen, M.C. Fujiwara, D.R. Gill, A. Gutierrez, J.S. Hangst, W.N. Hardy, M.E. Hayden,, C.A. Isaac, A. Ishita, S.A. Jones, S. Jonsell, L. Kurchaninov, N. Madsen, M. Mathers, D. Maxwell, J.T.K. McKenna, S. Menary, J.M. Michan, T. Momose, J.J. Munich, P. Nolan, K. Olchanski, A. Olin, A. Povilus, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, R.L. Sacramento, M. Sameed, E. Sarid, D.M. Silveira, S. Stracka, G. Stutter, C. So, T. D. Tharp. J. Thompson, R.I. Thompson, D.P. van der Werf, J.S. Wurtele, A. I. Zhmoginov.
        Speaker: Arthur Olin (TRIUMF)
        Slides
      • 154
        Lepton-flavour universality tests at LHCb
        In the Standard Model, the three charged leptons are identical copies of each other, apart from mass differences. Experimental tests of this feature in decays of b hadrons are highly sensitive to New Physics particles which preferentially couple to the 2nd and 3rd generations of leptons. This talk will review the latest lepton universality tests at LHCb in both charged-current and neutral-current semileptonic decays.
        Speaker: Anna Lupato
        Slides
    • 4:00 PM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Dark matter and cosmology 301B

      301B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 155
        Darkside Status and Prospects
        Located at the INFN Laboratori Nazionali del Gran Sasso, Italy, DarkSide (DS) is a dark matter search project, which features a dual-phase liquid argon Time Projection Chamber as the WIMP detector, surrounded by an organic liquid-scintillator neutron veto and a water-Cherenkov muon veto. The current DS-50 has been running since 2013, initially with atmospheric Ar (AAr) and then, starting in April 2015, with Ar extracted from underground sources. The underground Ar (UAr) is measured to contain lower Ar-39 than AAr by a factor of (1.4±0.2)×103. We have reported a 70.9 live-days of UAr data set with a fiducial mass of (36.9+-0.6) kg in a non-blinded analysis. When combined with our preceding search with AAr, we have set a 90% C.L. upper limit on the WIMP-nucleon spin-independent cross section of 2.0×10−44 cm2 for WIMPs of 100 GeV/c2. This is the world leading exclusion curve with Ar target as of April 2017. By June 2017, DS-50 will have accumulated 500+ live-days of blinded data with the UAr target. The blind analysis is ongoing. The proposed next stage, DS-20k, will have a 20-ton fiducial mass, SiPM as the photo-sensors, and background well below that from coherent scattering of solar and atmospheric neutrinos. DS-20k plans to start commissioning in 2020 and will be sensitive to WIMP-nucleon interaction cross sections of 1×10−47 cm2 for WIMPs of 1 TeV/c2 for an exposure of 100 ton yr.
        Speaker: Xin Xiang (P)
        Slides
      • 156
        Observational role of dark matter in f(R) models for structure formation
        The fixed points for the dynamical system in the phase space have been calculated with dark matter in the f(R) gravity models. The stability conditions of these fixed points are obtained in the ongoing accelerated phase of the universe, and the values Hubble parameter and Ricci scalar are obtained for various evolutionary stages of the universe. We present a range of some modifications of general relativistic action consistent with the lambda-CDM model. We elaborate upon the fact that the upcoming cosmological observations would further constrain the bounds on the possible forms of f(R) with greater precision that could in turn constrain the search for dark matter in colliders.
        Speaker: Murli Verma (University of Lucknow)
        Slides
      • 157
        Neutron Veto Detector of DarkSide-50 Experiment
        DarkSide-50 is a direct WIMP search underground experiment located at Gran Sasso, Italy. A detector with an active volume containing 50 kg of liquid argon, the DarkSide-50 Time Projector Chamber (TPC). The DarkSide-50 TPC is surrounded by a 30-ton boron-loaded liquid scintillator spherical neutron veto. This neutron veto is immersed in a 1,000 ton ultra-pure water, Cherenkov detector, acting as a muon veto and passive shielding against external neutrons and gammas. In DarkSide-50 experiment, we both actively suppress and measure the rate of neutron-induced background events by using the neutron veto detector. The boron-loaded liquid scintillator detector can detect the prompt coincidence signals coming from neutron thermalization after a neutron leaves TPC, as well as the delayed signal caused by neutron capture reaction with 10B, 1H and 12C. The capability of LSV to remove these neutron backgrounds requires a very high neutron veto efficiency. In order to quantify the response of LSV to neutron signals, neutron source calibrations were conducted in the last few years. One of the campaigns deployed Americium-Beryllium (241Am9Be) source and the other one was accomplished with Americium-Carbon (241Am13C) source. With 241Am9Be source, the neutron capture signals on 10B along with other isotopes in the LSV are studies to give a neutron veto efficiency of capture. However, the neutron from 241Am9Be source is in coincident with γ particles most of the time, which is not a good candidate source for the prompt neutron veto efficiency. To compensate this, 241Am13C source, a much cleaner neutron source, was deployed to study the neutron thermalization signals in the veto prompt region so that the neutron veto efficiency of prompt can be derived, which is a crucial feature of the DarkSide-50 experiment. In this talk, I will give both the calculation of the neutron veto efficiency and the expected radiogenic neutron background events in one year UAr data.
        Speaker: Hao Qian (Princeton University)
        Slides
    • Development of accelerators and detectors 301A

      301A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 158
        The LUCID-2 detector
        The LUCID-2 detector is the main online and offline luminosity provider of the ATLAS experiment. It provides over 100 different luminosity measurements from different algorithms for each of the 2808 LHC bunches. LUCID was entirely redesigned in preparation for LHC Run 2: both the detector and the electronics were upgraded in order to cope with the challenging conditions expected at the LHC center of mass energy of 13 TeV with only 25 ns bunch-spacing. While LUCID-1 used gas as a Cherenkov medium, the LUCID-2 detector is in a new unique way using the quartz windows of small photomultipliers as the Cherenkov medium. The main challenge for a luminometer is to keep the efficiency constant during years of data-taking. LUCID-2 is using an innovative calibration system based on radioactive 207 Bi sources deposited on the quartz window of the readout photomultipliers. This makes it possible to accurately monitor and control the gain of the photomultipliers so that the detector efficiency can be kept stable at a percent level. A description of the detector and its readout electronics will be given, as well as preliminary results on the ATLAS luminosity measurement and related systematic uncertainties.
        Speaker: Vincent Hedberg (I)
        Slides
      • 159
        Ring Imaging Cherenkov Detector Technologies for Particle Identification in the Electron-Ion Collider Experiments
        In the proposed Electron-Ion Collider (EIC) experiments, particle identification (PID) of the final state hadrons in the semi-inclusive deep inelastic scattering allows the measurement of flavor-dependent gluon and quarks distributions inside nucleons and nuclei. An EIC PID consortium (eRD14 Collaboration) has been formed for identifying and developing PID detectors using the Ring Imaging Cherenkov (RICH) technique for the EIC experiments. A modular Ring Imaging Cherenkov (mRICH) detector has been designed for particle identification in the momentum coverage from 3 GeV/c to 10 GeV/c. The first prototype of this detector was successfully tested at Fermi National Accelerator Laboratory in April 2016 for verifying the detector working principles. The mRICH detector consists of an aerogel radiator block, a Fresnel lens, a mirror-wall and a photosensor plane. This talk will highlight the mRICH beam test results and the comparison with the results from a Geant4-based detector simulation. An implementation of the mRICH detector concept in the forward sPHENIX experiment at BNL will also be presented in this talk.
        Speaker: Xiaochun He (G)
        Slides
      • 160
        The upgrade of Endcap TOF in BESIII
        The upgrade of the current BESIII Endcap TOF is carried out with the Multi−gap Resistive Plate Chamber (MRPC) technology. The installation of the new E−TOF has been finished in summer 2015. The results of the MRPC detectors commissioning will be reported.
        Speaker: Mr zhi WU
        Slides
      • 161
        SiPM-based Wide Field of View Cherenkov Telescope for LHAASO Experiment
        Speaker: Dr Shoushan Zhang (Institute of High Energy Physics)
        Slides
    • Energy frontier physics beyond the standard model 302A

      302A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 162
        Inclusive searches for squarks and gluinos with the ATLAS detector
        Speaker: Moritz BACKES (Oxford)
        Slides
      • 163
        Searches for direct pair production of third generation squarks with the ATLAS detector
        Speaker: Federico Meloni (Universitaet Bern)
        Slides
      • 164
        Searches for electroweak production of charginos, neutralinos and sleptons with the ATLAS detector
        Speaker: Antoine MARZIN (CERN)
        Slides
    • Hadron spectroscopy and exotics 303B

      303B

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 165
        Recent results from KLOE-2
        The KLOE experiment has collected 2.5 fb$^{-1}$ at the e+e- collider DAPHNE. The upgraded detector KLOE-2 has already collected 3.5 fb$^{-1}$ with a new beam crossing scheme, allowing for a reduced beam size and increased luminosity. Analysis of KLOE data is still in progress in different sectors. Precision physics requires appropriate inclusion of higher order effects and the knowledge of very precise input parameters of the electroweak Standard Model. The running of the QED coupling constant alpha in the time-like region in the energy range 0.6-0.975 GeV has been measured for the first time using the KLOE detector. The result shows a clear contribution of the rho-omega resonances to the photon propagator with a significance of the hadronic contribution of more than 5 sigmas. For the first time the real and imaginary part of Delta(alpha(s)) have been extracted. A new, precise result on the isospin-violating decay $\eta\to\pi^+\pi^-\pi^0$, aiming to a better determination of the light-quark mass ratio has been published. The analysis determines with very good accuracy the parameters of the decay matrix element, providing an improvement of a factor of two on the statistical uncertainty of all parameters with respect to previous experiments. Smaller systematic uncertainties have been also achieved. The un-binned integrated left-right, quadrant and sextant charge asymmetries have also been measured, providing an accurate test of C parity conservation. The values extracted are consistent with zero at $10^{-4}$ level, thus improving existent evaluations. We also searched for the existence of the dark photon in a quite complete way, investigating three different processes and six different final states: (1) dalitz decays of the $\phi$ meson, $\phi\to\eta U$, with $U\to e^+e^-$ and $\eta\to\pi^+\pi^-\pi^0$ and $\pi^0\pi^0\pi^0$, (2) in $e^+e^- \to U \gamma$ events, with U decaying to electron, muon and pion pairs, (3) in the dark Higgsstrahlung process, $e^+e^- \to U h'$, $U\to \mu^+\mu^-, h' invisible. Tight limits on the model parameters have been set at 90% CL. Entangled neutral kaon pairs produced at DAPHNE are a unique tool to test discrete symmetries and quantum coherence at the utmost sensitivity, in particular strongly motivating the experimental searches of possible CPT violating effects, which would constitute an unambiguous signal of a New Physics framework. The status of the latest ongoing analyses on KLOE/KLOE-2 data using the most refined analyses tools will be presented and discussed: (i) measurement of the KS semileptonic charge asymmetry and tests of CP and CPT symmetry, (ii) test of Time reversal and CPT in transitions in phi->KSKL->pine,3pi0,(2pi) decays, (iii) search for the CP violating KS->3pi0 decay.
        Speaker: Dr Wojciech Krzemień
        Slides
      • 166
        Recent highlights of heavy-flavor baryon physics from Belle
        The $e^+ e^-$ collision events recorded by the Belle detector provides a great opportunity to make a precision study of baryonic states. We report the recent results on the study of baryons at Belle. This includes discovery of charmed strange baryon $\Xi_c(3055)$, measurements of new decays of charmed bayrons $\Xi_c$ and $\Omega_c$, and study of exotic baryons from two-photon collisions.
        Speaker: Masayuki Niiyama (Kyoto Univ.)
        Slides
      • 167
        Light meson decays at BESIII
        At present the world's largest sample of 1.3 billion J/psi events was accumulated at the BESIII detector, which provides a unique opportunity to investigate the eta/eta' decays via J/psi radiative or hadronic decays. The eta and eta' hadronic decays are sensitive tools for investigations of pi-pi and eta-pi interactions, symmetry breaking, and serve as a test of Chiral Perturbation Theory. In recent years considerable results on eta/eta' decays were achieved at BESIII experiment. In this talk we present the significant progresses focusing on amplitude analyses of Dalitz decays (e.g. eta'->3 pi PRL 118, 012001 (2017) ), observation new decay modes and search for rare/forbidden decays (e.g. eta'->gamma gamma pi0, arXiv: 1612.05721).
        Speaker: 云飞 龙 (Peking University)
        Slides
      • 168
        Charmonium decays at BESIII
        The BESIII Experiment at the Beijing Electron Positron Collider (BEPC2) has accumulated the world's largest samples of e+e- collisions in the tau-charm region. Using a sample of 106 million psi(3686) decays, the branch fractions of psi(3686) -> gamma chi_c0, gamma chi_c1, gamma chi_c2 are determined to be (9.389 +- 0.014 +- 0.332)%, (9.905 +- 0.011 +- 0.353)%, and (9.621 +- 0.013 +- 0.272)%, respectively. The branching fraction and the angular distributions of J/psi and psi(3686) decays to Lambda anti-Lambda and Sigma^0 anti-Sigma^0 final states are measured. J/psi and psi(3686) decays to Sigma(1385)^0 anti-Sigma(1385)^0 and Xi^0 anti-Xi^0 are measured. The decays to Sigma(1385)^0 anti-Sigma(1385)^0 are observed for the first time, and the angular parameters of these decays are also measured first time. Observation of hc radiative decay hc -> gamma eta' and evidence for hc -> gamma eta. The branching fractions are measured to be (1.52 +- 0.27 +- 0.29)/10^3 and (4.7 +- 1.5 +- 1.4)/10^4, respectively. Both of them are the first observations. Measurement of higher-order multipile amplitudes in psi(3686) -> gamma chi_c1,2 with chi_c1,2 -> gamma J/psi and search for the eta_c(2S) -> gamma J/psi transition. The normalized magnetic-quadrupole (M2) amplitude for psi(3686) -> gamma chi_c1,2 -> gamma gamma J/psi and the normalized electricoctupole (E3) amplitudes for psi(3686) -> gamma chi_c2, chi_c2-> gamma J/psi are determined. The decays psi(3686) -> e+ e- chi_c0,1,2 and chi_c0,1,2 -> e+ e-J/psi are searched, and they are observed for the first time. Improved measurements of branching fractions for eta_c -> phi phi and omega phi. The branching fraction of eta_c -> phi phi is measured with improved precision. No significant signal for the double OZI-suppressed decay of eta_c -> omega phi is observed, and the upper limit on the branching fraction is determined.
        Speaker: Mr Jielei ZHANG (Xinyang Normal University)
        Slides
    • Hot and dense matter physics (QGP and heavy ion collision) 303A

      303A

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 169
        Measuring gluon Sivers function at a future Electron-Ion Collider
        Sivers function describes the anisotropy of parton distributions inside a transversely polarized nucleon in the momentum space. The study of the largely unexplored gluon Sivers function (GSF) is important to obtain a complete picture of the 2+1D momentum structure of nucleons. It is proposed that the GSF can be studied through the single spin asymmetry (SSA) with collisions of electrons on transversely polarized protons at a future high energy, high luminosity Electron-Ion Collider (EIC). In this work, we have performed a systematic study on the feasibility of measuring gluon Sivers function through dihadron and dijet measurements. It will be shown that the behavior of gluon Sivers function can be well constrained at an EIC especially with the dijet probes.
        Speaker: Dr Liang Zheng (Central China Normal University)
        Slides
      • 170
        Heavy ion physics at LHCb
        Since 2013, LHCb has been developing an ambitious heavy ion physics program which is highly complementary to the other LHC experiments, thanks to the unique coverage of the forward rapidity region and the detector specialized capabilities on reconstruction of heavy flavour hadrons. In this talk, we will present the latest results in p-Pb and Pb-p collisions at sqrt(sNN)=5.02 and 8.16 TeV. Cold Nuclear Matter effects are tested with accurate measurements of nuclear modification factors and forward-backward production of prompt and displaced quarkonia, open charm states as well as of strange hadrons. In 2015, LHCb participated successfully for the first time in the PbPb data-taking. The status of the forward prompt J/ψ nuclear modification factor measurement in lead-lead collisions is discussed.
        Speaker: Jiayin SUN (Tsinghua)
        Slides
      • 171
        Measurement of quarkonia production in heavy-ion collisions with the ATLAS detector
        The suppression of heavy quarkonia states in heavy-ion collisions is a phenomenon understood as a consequence of QGP formation in the hot, dense system produced in interactions of heavy ions at high energy. In addition to hot matter effects, cold nuclear effects can play an important role in quarkonia production. Therefore, a full assessment of different physics scenarios requires detailed studies on the effects present in Pb+Pb and p+Pb collisions in comparison to the pp collisions. Results of the studies based on p+Pb data collected in 2013 and pp and Pb+Pb data collected in 2015 at the LHC by the ATLAS experiment at the centre of mass energy of 5.02 TeV allowed studying prompt and non-prompt J/ψ and ψ(2S) productions as well as Υ(nS) (n = 1, 2, 3) production via the di-muon decay final states. The results of the measurements presented as a function rapidity and transverse momentum as well as the ratios between different species and systems are presented and discussed in the talk.
        Speaker: Sebastian TAPIA ARAYA (Valparaiso)
        Slides
      • 172
        Jets in heavy-ion collisions with the ATLAS detector
        Jets constitute a golden probe to study the quark gluon plasma produced in heavy ion collisions at the LHC. Being produced at the early stages of the collisions, they are expected to be modified as propagating through the hot and dense medium. A signature of the modification is the energy loss lowering the jet yields at a given transverse momentum. A factor of two suppression is observed in central Pb+Pb collisions with respect to pp collisions. Other signatures are the modification of the dijet momentum balance and the modification of fragmentation functions. This talk will present the currently available jet results from ATLAS in Run 2. The high statistical significance of this data sample collected by ATLAS in Run 2 allows precision measurements of these observables in a wide range of transverse momentum, centrality and rapidity intervals.
        Speaker: Helena SANTOS (Portugal 1-LIP)
        Slides
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 173
        Tests of symmetries and conservation laws
        Speaker: Prof. Michael Ramsey-Musolf (Univ. of Mass.)
        Slides
      • 174
        Accelerator: LHC+FCC
        Speaker: Dr Frédérick BORDRY (CERN)
        Slides
      • 175
        Accelerator: CEPC+SppC
        Speaker: Dr Qing Qin (高能所)
        Slides
    • 10:15 AM
      Coffee Break The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 176
        Accelerator: ILC
        Speaker: Dr Shinichiro Michizono (KEK)
        Slides
      • 177
        Development of detectors
        Speaker: Prof. Attilio Andreazza (Università degli Studi di Milano and INFN)
        Slides
      • 178
        Applications of nuclear particle physics technology
        Speaker: Prof. Drew Weisenberger (Jefferson Lab)
        Slides
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 179
        Nuclear Astrophysics deep underground
        Cross sections of nuclear reactions relevant for astrophysics are crucial ingredients to understand the energy generation inside stars and the element nucleosynthesis. At astrophysical energies, nuclear cross sections are often too small to be measured in laboratories on the Earth’s surface, where the signal would be overwhelmed by the cosmic-ray induced background. The Laboratory for Underground Nuclear Astrophysics (LUNA) is placed under the Gran Sasso mountains (Italy). The extremely low background achieved at LUNA allows to perform uniquely sensitive experiments. Over the years, many crucial reactions involved in stellar hydrogen burning as well as big bang nucleosynthesis have been measured at astrophysical energies. An overview of the latest results and future perspectives of the LUNA experiment will be given.
        Speaker: Rosanna Depalo (Dipartimento di Fisica e Astronomia and INFN Padova)
        Slides
      • 180
        Particles and Nuclei from the Cosmos
        The Alpha Magnetic Spectrometer (AMS) is a high energy physics experiment operating aboard International Space Station. Since May 2011, more the 100 billion charged cosmic rays has been recorded by AMS. The latest AMS results, including lepton, hadron and nuclei fluxes from He to O will be presented up to the highest energy range.
        Speaker: Dr Qi Yan (MIT)
        Slides
      • 181
    • 10:15 AM
      Coffee Bread The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
    • Plenary The Auditorium (Plenary Session)

      The Auditorium (Plenary Session)

      China National Convention Center

      No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
      • 182
        Searching for Dark Matter
        Dark matter is among the most important mysteries in science today. There are compelling arguments that dark matter particles are a class of weakly-interacting massive particles, or WIMPs, that arise naturally in physics beyond the standard model. WIMP searches using various low-energy detectors have been conducted around the globe for nearly thirty years, with dramatic improvements in scale and sensitivity. After a brief overview of the field, I will focus on a Chinese dark matter experiment, PandaX-II, running in the Jinping Underground Lab, in Sichuan Province. The PandaX-II detector uses 580kg ultrapure liquid xenon as the detection target, and has a record sensitivity about ~0.1 events/tonday. The most recent results with an exposure of 54 tonday data will be shown and discussed. The future running and upgrading plan of the PandaX experiment will be presented, along with the prospect of building the world “ultimate WIMP dark matter detector” in the next decade.
        Speaker: Prof. Xiangdong JI (SJTU)
        Slides
      • 183
        Status and Prospects of Gravitational-Wave Astrophysics
        The detection of gravitational waves from pairs of black holes has opened up the possibility to observe the Universe not possible before. I will review some of the existing results and discuss several exciting opportunities for gravitational-wave astrophysics.
        Speaker: Tjonnie Li (T)
      • 184
        Closing
        Speaker: Xiaoyan Shen (IHEP)
        Slides