Dr
Masato for the Tibet ASgamma collaboration TAKITA
(Institute for Cosmic Ray Research, the University of Tokyo)
10/25/21, 9:30 PM
oral
The Tibet ASgamma experiment is located at 4,300m above sea level, at Yangbajing, in Tibet, China.The experiment is composed of a 65,700 m2 surface air shower array and 3,400 m2 underground water Cherenkov muon detectors. The surface air shower array is used for reconstructing the primary particle energy and direction, while the underground muon detectors enable us to discriminate gamma-ray...
Prof.
Pasquale Blasi
(Gran Sasso Science Institute)
10/25/21, 10:35 PM
Dr
sara tomita
(Tohoku University)
10/26/21, 8:30 AM
oral
Cosmic rays are thought to be efficiently produced in collisionless shocks in high-energy astrophysical sources, where cosmic rays are diffusively scattered by magnetic fluctuations. The magnetic field near the shock decides the maximum energy of cosmic rays accelerated in the sources and emission mechanisms by the accelerated particles. However, magnetic field strength and structure around...
Dr
Shangming Chen
(Huazhong University of Science and Technology)
10/26/21, 8:55 AM
oral
TeV gamma-ray binaries, consisting of a compact object in orbit with a massive star, emit broad-band radiations from radio to TeV gamma-rays. The energy spectra of gamma-ray binaries peak above 1 MeV, distinguishing them from the well-known X-ray binaries. So far, less than ten such kinds of binaries have been found, and only 2 of them with the compact objects being identified as rotational...
Tsunefumi Mizuno
(Hiroshima University)
10/26/21, 10:10 AM
oral
In studying the interstellar medium (ISM) and Galactic cosmic rays (CRs), uncertainty of the interstellar gas density has always been an issue. To overcome this difficulty, we newly considered HI line profiles in the analysis of gamma-ray data from the Fermi Large Area Telescope (LAT) for the MBM 53, 54, and 55 molecular clouds and the Pegasus loop. We decomposed the ISM gas into...
Mr
Kai-Kai Duan
(PMO)
10/26/21, 10:35 AM
oral
DArk Matter Particle Explorer (DAMPE), a space-borne high energy cosmic ray and gamma-ray detector, has surveyed the whole sky for five years and collected more than 220,000 photons above 2 GeV since the launching on Dec. 17, 2015. Based on the 5-yr DAMPE observation, we have detected more than 200 gamma-ray sources and the Fermi Bubbles. With the excellent energy resolution, DAMPE has an...
Olga Sergijenko
(Taras Shevchenko National University of Kyiv)
10/26/21, 11:00 AM
oral
Astrophysical objects capable of hadronic acceleration to relativistic energies have long been believed to be sources of astrophysical neutrinos. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. This may point to a large population of faint, steady sources or flaring objects as origins of this flux. The spatially and temporally 3σ...
Yifan Jin
(INFN Trieste)
10/26/21, 3:00 PM
oral
The Belle II experiment at the SuperKEKB energy-asymmetric e+e− collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The target luminosity of the machine is 6×1035 cm−2s−1 and the Belle II experiment aims to record 50 ab−1 of data, a factor of 50 more than its predecessor. With this data set, Belle II will be able to measure the Cabibbo-Kobayashi-Maskawa...
Dr
Shunichi Horigome
(Kavli IPMU)
10/26/21, 3:00 PM
oral
Dwarf spheroidal galaxies (dSphs) are known as promising candidates of the indirect detection of the WIMP dark matter. However, the sensitivity of the detection depends on an astrophysical factor, so-called $J$-factor, which has various statistical uncertainties. These uncertainties affect the sensitivity of the detection by a factor of O(10), thus we should consider these uncertainties to...
Chuan YUE
(Purple Mountain Observatory)
10/26/21, 3:00 PM
oral
The DArk Matter Particle Explorer (DAMPE) is a space-based mission designed as a high energy particle detector for measuring cosmic-rays and gamma-rays in space. It was successfully launched on December 17, 2015, and since then has been in stable data taking for more than five and a half years. The large geometric factor and thick calorimeter enables DAMPE to have very good potential to...
Sonal Ramesh Patel
(D)
10/26/21, 3:20 PM
oral
We present multi-waveband studies of the TeV gamma-ray binary, LS I +61° 303. LS I +61° 303 displays variable emission from radio to TeV, modulated with the orbital period of 26.5 days, and with a spectral energy distribution peaking at MeV-GeV energies. The imaging atmospheric Cherenkov telescope array, VERITAS, has been observing this binary since November 2006 and has collected a rich...
Dr
Moritz Huetten
(ICRR, The University of Tokyo)
10/26/21, 3:20 PM
oral
We present a search for dark matter (DM) spectral lines in the Galactic centre (GC) region with the MAGIC telescopes. MAGIC is a stereoscopic system of Atmospheric Cherenkov telescopes, located on the Canary island of La Palma (Spain) and sensitive to gamma rays in the energy range from 50 GeV to 50 TeV. Observations at high zenith angles significantly increase the telescopes’ collection area...
Yunxuan Song
(Peking University , University of Chinese Academy of Sciences)
10/26/21, 3:20 PM
oral
BESIII has collected data sets of 448.2 M $\psi(3686)$ events and 10 B $J/\psi$ events. The huge clean data samples provide an excellent opportunity to search for new physics. We report the search for decay $J/\psi\to \gamma + \rm invisible$, which is predicted by next-to-minimal supersymmetric model. Without significant signal found, we gave around 6.2 times better UL than previous CLEO-c’s...
Dimitrios Kyratzis
(Gran Sasso Science Institute (GSSI) and INFN-LNGS)
10/26/21, 3:20 PM
oral
The Dark Matter Particle Explorer (DAMPE), is a space–borne detector designed for precise galactic Cosmic Ray (CR) studies in a wide energy range (up to hundreds of TeV), along with detailed measurements of high–energy gamma–rays and indirect searches of Dark Matter (DM) annihilation/decay to detectable particles. The satellite was successfully launched into a sun–synchronous orbit at 500 km,...
Dr
Atreyee SINHA
(LUPM, CNRS)
10/26/21, 3:40 PM
oral
Cosmic Ray (CR) interactions with the dense gas inside Giant Molecular Clouds (GMCs) produce neutral pions, which in turn, decay into gamma rays. Because of the high target density for CRs in GMCs the study of gamma-ray emission from GMCs can yield a model-independent insight into the spatial and spectral properties of CRs without any significant contamination by other sources. While multiple...
Mr
Alessandro Montanari
(CEA-Saclay / Irfu-DPhP / University Paris Saclay)
10/26/21, 3:40 PM
oral
The presence of dark matter (DM) in the universe is indicated by copious astrophysical and cosmological measurements, however, its underlying nature is still under debate. Among the most promising candidates to explain dark matter are weakly interacting massive particles (WIMPs), that have mass and coupling strength at the electroweak scale. If thermally produced in the early universe, WIMPs...
Xuyang Gao
(Fudan University)
10/26/21, 3:40 PM
oral
Search for high mass BSM are performed in dilepton final states using the proton-proton collision dataset at a center-of-mass energy of 13 TeV collected by CMS in 2016, 2017, and 2018, corresponding to integrated luminosities up to ~140/fb. The observations are consistent with the expectations of the standard model in all searched channels. Upper limits on the cross sections are calculated and...
Alejandra Aguirre-Santaella
(IFT)
10/26/21, 4:00 PM
poster
TeV DM candidates are gradually earning more and more attention within the community. Among others, extra-dimensional brane-world models may produce thermal DM candidates with masses up to 100 TeV, which could be detected with the next generation of very-high-energy gamma-ray observatories such as the Cherenkov Telescope Array (CTA). In this work, we study the sensitivity of CTA to branon DM...
Ruben Lopez-Coto
(I)
10/26/21, 4:00 PM
oral
The Southern Wide-field Gamma-ray Observatory (SWGO) is a proposed ground-based gamma-ray detector that will be located in the Southern Hemisphere and is currently in its design phase. In this contribution, we will outline the prospects for Galactic science with this Observatory. Particular focus will be given to the detectability of extended sources, such as gamma-ray halos around pulsars;...
Michael Korsmeier
(O)
10/26/21, 4:00 PM
oral
Space-borne experiments like AMS-02 determine cosmic-ray spectra with unprecedented precision. This allows for more elaborate and better examinations of cosmic-ray propagation in our Galaxy. However, the analysis of this increasingly precise cosmic-ray data requires also a more careful assessment of systematic uncertainties. I will present the results from the analysis of comic-ray...
Antonio SIDOTI
(Bologna)
10/26/21, 4:00 PM
oral
Many theories beyond the Standard Model predict new phenomena, such as Z’, W’ bosons, or heavy leptons, in final states with isolated, high-pt leptons (e/mu/tau). Searches for new physics with such signatures, produced either resonantly or non-resonantly, are performed using the ATLAS experiment at the LHC. This includes a novel search that exploits the lepton-charge asymmetry in events with...
Vo Hong Minh Phan
(TTK, RWTH Aachen University)
10/26/21, 4:20 PM
poster
Supernova remnants interacting with molecular clouds are ideal laboratories to study the acceleration of particles at shock waves and their transport and interactions in the surrounding interstellar medium. In this paper, we focus on the supernova remnant W28, which over the years has been observed in all energy domains from radio waves to very-high-energy gamma rays. The bright gamma-ray...
Veronika vodeb
(University of Nova Gorica)
10/26/21, 4:20 PM
oral
Pulsar halos constitute a recently identified TeV class of sources that will be observed with the upcoming Cherenkov Telescope Array (CTA), especially in the context of the Galactic Plane Survey (GPS), one of the Key Science Projects of CTA. In this study, we examine the prospects offered by CTA for the detection and characterization of such objects. CTA will cover energies from 20 GeV to 300...
Zebing WANG
10/26/21, 4:20 PM
oral
This talk will present latest results of the searches for Axion-like particles at CMS experiment.
Daniel Salazar-Gallegos
(Michigan State University)
10/26/21, 4:40 PM
oral
The search for new physics beyond the Standard Model (SM) is closely tied to understanding the nature of Dark Matter (DM). Dwarf spheroidal galaxies (dSphs) are prime targets for indirect DM searches because their ratios of DM mass to baryonic mass is high. We present a novel combination analysis with multiple gamma-ray observatories. We established a collaboration of three Imaging Air...
Dr
Siming Liu
(Purple Mountain Observatory)
10/26/21, 4:40 PM
oral
In this talk, I will review our recent multiwavelength study of a sample of gamma-ray supernova remnants (SNRs), which can be used to constrain evolution of high energy particles in SNRs. Our results suggest that shocks of SNRs may not be efficient PeVatrons. However, they can readily accelerate particles to about 100 TeV. In particular, shocks of the supernova that gave rise to the Geminga...
Gwenael Giacinti
(MPIK Heidelberg)
10/26/21, 5:00 PM
oral
We study electron and positron acceleration at the termination shock of a striped pulsar wind by integrating particle trajectories in a prescribed model of the magnetic field and flow pattern. We find that drift motion on the shock surface maintains either electrons or positrons on Speiser orbits in a ring-shaped region close to the equatorial plane of the pulsar, where they are accelerated to...
Patrick BAUER
(Physics Institute of Bonn University)
10/26/21, 5:00 PM
oral
Leptoquarks (LQ) are predicted by many new physics theories to describe the similarities between the lepton and quark sectors of the Standard Model and offer an attractive potential explanation for the lepton flavour anomalies observed at LHCb and flavour factories. The ATLAS experiment has a broad program of direct searches for leptoquarks, coupling to the first-, second- or third-generation...
Aion Viana
(IFSC-Universidade de São Paulo)
10/26/21, 5:00 PM
oral
Despite mounting evidence that dark matter (DM) exists in the Universe, its fundamental nature remains unknown. We present sensitivity estimates to detect DM particles with a future very-high-energy (≳ TeV) wide field-of-view gamma-ray observatory in the Southern Hemisphere, currently in its research and development phase under the name Southern Wide field-of-view Gamma-ray Observatory (SWGO)....
Dr
Pierre Cristofari
(Observatoire de Paris)
10/26/21, 5:00 PM
oral
The search for pevatrons (objects capable of accelerating partilces up to 10$^{15}$ eV) has become one of the key targets of the high--energy gamma--ray community.
These objects are of crucial importance in the context of the origin of cosmic rays (CRs), since the sources of Galactic CRs are expected to
be able to accelerate particles up to PeV energies, at least at some stage of their...
Dr
Vo Hong Minh Phan
(TTK, RWTH Aachen University)
10/26/21, 5:20 PM
oral
Data from the Voyager probes have provided us with the first measurement of cosmic ray intensities at MeV energies, an energy range that had previously not been explored. Simple extrapolations of models that fit data at GeV energies, e.g., from AMS-02, however, fail to reproduce the Voyager data in that the predicted intensities are too high. Oftentimes, this discrepancy is addressed by adding...
Mr
Yiwei Bao
(Nanjing University)
10/26/21, 5:20 PM
oral
Multi-wavelength observations indicate that there must be a hadronic component in the $\gamma$-ray spectrum of SNR G106.3+2.7. However, fitting the hard $\gamma$-ray spectrum requires a hard proton spectrum, while usual observations and recent numerical simulations prefer a soft proton
spectrum. Here we explore an alternative scenario to explain the γ-ray spectrum
of G106.3+2.7 within the...
Jeongeun Lee
(Seoul National University)
10/26/21, 5:20 PM
oral
Many extensions to the Standard Model predict new phenomena occurring at high mass. These include new scalar or vector resonances, as well as new heavy fermions. This talk will summarize recent searches for such heavy particles based on 13 TeV pp collision data collected by the CMS experiment at the LHC.
Barbara Skrzypek
(Harvard University)
10/26/21, 5:40 PM
oral
Observations of high-energy astrophysical neutrinos in IceCube have opened the door to multi-messenger astronomy, by way of which questions in particle physics could be explored through a combination of IceCube data and optical experiments such as Fermi-LAT. However, the origin of these astrophysical neutrinos is still largely unknown. Among the tensions that still need to be addressed, for...
Dr
Robert Brose
(DIAS)
10/26/21, 5:40 PM
oral
Supernova remnants (SNRs) are known to accelerate particles to relativistic energies, on account of their nonthermal emission. The particularities of the acceleration mechanism are still debated and here we discuss how particle escape modifies the observable spectra as well as morphological features that might be revealed by the observational progress from radio to gamma-ray energies.
We...
Jeffrey Lazar
(Harvard University)
10/26/21, 6:00 PM
oral
In 2016 and 2018, the ANITA collaboration reported the observation of two anomalous events, with polarizations consistent with up-going neutrinos, but coming from too far below the horizon to actually make it through the Earth given their energies. While all Standard Model (SM) explanations of these events have been ruled out, explanations from beyond Standard Model scenarios have been put...
Sotiroulla Konstantinou
(Univ. of Cyprus)
10/26/21, 6:00 PM
oral
Several theories beyond the Standard Model predict the existence of additional neutral or charged Higgs particles other than the 125 GeV Higgs boson. In this presentation, the latest CMS results on searches for these particles will be discussed.
Arnau Aguasca-Cabot
(Universitat de Barcelona)
10/26/21, 6:00 PM
poster
The Cherenkov Telescope Array (CTA) prototype Large-Sized Telescope (LST-1) was inaugurated in 2018 and, after its commissioning, it is progressively entering the scientific data taking phase. In this contribution, we present a dedicated study on the capability of LST-1 to probe the very high energy (VHE) emission from galactic transient sources. Making use of numerical simulations of the VHE...
Dmitry Khangulyan
(Rikkyo University)
10/26/21, 8:30 PM
Marina Manganaro
(University of Rijeka)
10/26/21, 9:00 PM
oral
MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov telescopes) is a system of two Cherenkov telescopes located on the Canary island of La Palma (Spain), at the Roque de Los Muchachos Observatory. MAGIC telescopes are operating in stereo mode since 2009. Their design and configuration, together with a dedicated trigger system developed ad-hoc, allows us to reach an energy threshold of 15GeV....
Mr
Stephan O'Brien
(McGill University)
10/26/21, 9:30 PM
oral
The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is an array of four 12m imaging atmospheric Cherenkov telescopes located in Southern Arizona, USA. Sensitive to gamma rays in the ~80 GeV to >30 TeV energy range, VERITAS is amongst the most sensitive instruments currently operating within this energy regime. VERITAS operates a diverse science program including studies of...
Juan Cortina
(CIEMAT)
10/26/21, 10:05 PM
oral
Gamma ray detectors are key for understanding the non-thermal processes in our universe, usually associated with highly energetic processes in black hole jets, neutron stars or stellar explosions. They are also a unique tool in Fundamental Physics and Cosmology, and, together with cosmic ray, neutrino and gravitational wave detectors, have inaugurated the field of multimessenger astronomy.
At...
Bing ZHANG
(University of Nevada, Las Vegas)
10/26/21, 10:35 PM
Mr
Jian LI
(Institute of High Energy Physics, CAS)
10/26/21, 11:05 PM
Gamma-ray binaries are binary systems producing most of their electromagnetic output in gamma rays above 1 MeV. Their multi-wavelength emission are orbitally modulated from radio to TeV and there are only a handful of known gamma-ray binaries. In this talk I will try to review previous results on gamma-ray binaries and also the recent progresses.
Ms
Rebecca Diesing
(University of Chicago)
10/27/21, 8:30 AM
oral
Galactic cosmic rays (CRs) are accelerated by astrophysical shocks, primarily supernova remnants (SNRs), via diffusive shock acceleration (DSA), an efficient mechanism that predicts power-law energy distributions of CRs. However, observations of both nonthermal SNR emission and Galactic CRs imply CR spectra that are steeper than the standard DSA prediction, $\propto E^{-2}$. Recent kinetic...
Alejandra Aguirre-Santaella
(IFT)
10/27/21, 8:50 AM
oral
In this work, we carry out a suite of specially-designed numerical simulations to shed further light on dark matter (DM) subhalo survival at mass scales relevant for gamma-ray DM searches, a topic subject to intense debate nowadays. Specifically, we have employed an improved version of DASH, a GPU N-body code, to study the evolution of low-mass subhalos inside a Milky Way-like halo with...
Ms
Liping wang
(SDU IHEP)
10/27/21, 8:50 AM
oral
The longitude development of the muonic component in the extensive air shower can help to determine mass composition of cosmic rays. By using the timing information of muons, the production positions of muons can be reconstructed . X_max^μwhich is the position with muon production reaching maximum is sensitive to the mass composition of cosmic rays. In this paper, the reconstruction of muon’s...
Xiaoting Feng
(Shandong University)
10/27/21, 9:10 AM
oral
The muons number observed at the ground from air showers is sensitive to the mass composition of cosmic rays and hadronic interaction model, the attenuation length of these muons will affect the measurement of the muon number. The muon detectors of LHAASO KM2A can directly measure the muons number in the air shower. Using the data recorded by the first-quarter array of KM2A in August 2020, the...
Shu Li
(TDLI, SJTU)
10/27/21, 9:30 AM
oral
The talk will present the physics motivation, the conceptual design and the latest R&D status of the Dark Photon search experiment at SHINE (i.e. Dark SHINE-暗光计划). The project will also have further physics program expansion for exotic muonium state search, LLP search and other BSM signatures to be explored.
Dr
Jingjing Zang
(Linyi University)
10/27/21, 9:50 AM
oral
The Forbush Decrease (FD) represents the rapid decrease of the intensities of charged particles accompanied with the coronal mass ejections (CMEs) or high-speed streams from coronal holes. We study the FD event occurred in September, 2017, with the electron and positron data recorded by the Dark Matter Particle Explorer. The evolution of the FDs from 2 GeV to 20 GeV with a time resolution of 6...
Mr
Yun-Feng Liang
(Laboratory for Relativistic Astrophysics, Department of Physics, Guangxi University, Nanning 530004, China)
10/27/21, 10:10 AM
oral
Axion-like particles (ALPs) are hypothetical particles predicted by many extensions of the Standard Model and can also be candidates for dark matter. Many astrophysical phenomena are expected if ALPs exist. At GeV to TeV energies, they could lead to spectral oscillations of distant sources that travel across the external magnetic field. ALPs may also reduce the TeV opacity of the universe,...
Chengming LIU
(USTC)
10/27/21, 10:10 AM
oral
The existence of fractionally charged particles (FCP) in present is some extensions to the Standard Model of particle physics, and their detection would be a significant breakthrough. Most of the previous cosmic-rays (CRs) studies are mainly focused on the secondary CRs from the extensive air shower, but there is rarely on-orbit study to search FCP from primary CRs. The DArk Matter Particle...
Diyaselis Delgado Lopez
(Harvard University)
10/27/21, 10:30 AM
oral
Dark matter (DM) particles are predicted to decay into Standard Model particles which would produce signals of neutrinos, gamma-rays, and other secondary particles. Neutrinos provide an avenue to probe astrophysical sources of DM particles. We review the decay of dark matter into neutrinos over a range of dark matter masses from MeV/c2 to ZeV/c2. We examine the expected contributions to the...
Dr
Jia-Shu Niu
(Shanxi University)
10/27/21, 10:30 AM
oral
Many experiments have confirmed the spectral hardening at a few hundred GV of cosmic-ray (CR) nuclei spectra, and 3 general different origins have been proposed: the primary source acceleration, the propagation, and the superposition of different kinds of sources. In this talk, I will report some new findings from the AMS-02 nuclei spectra of B and its dominating parents species (C, N, O, Ne,...
Prof.
Nicole Bell
(The University of Melbourne)
10/27/21, 10:50 AM
oral
The capture of dark matter (DM) in neutron stars provides a cosmic laboratory in which to study the nature of dark matter particles and their interactions under extreme conditions. We outline an improved treatment of the dark matter capture process that incorporates a number of important, yet previously overlooked, physical effects, including momentum dependent form factors and baryon...
Dr
Chen Sun
(Tel Aviv University)
10/27/21, 11:10 AM
oral
In this talk, I will discuss possible constraints on the axion-photon coupling arising from supernova remnants. I will assume axions to be dark matter and focus on the gegenschein signals from their decay stimulated by radios emitted from supernova remnants. I will show that this could put competitive bounds in the axion mass range between $10^{-6}$ eV and $10^{-4}$ eV.
Yuchao Gu
(Nanjing University)
10/27/21, 11:30 AM
oral
The recent measurements of the cosmological parameter H0 from the direct local observations and the inferred value from the cosmic microwave background show approximately 4σ discrepancy. This may indicate new physics beyond the standard ΛCDM. We investigate the keV gravitino dark matter that has a small fraction of nonthermal components (e.g., from the late decay of...
Giacomo D\'Amico
(U)
10/27/21, 3:00 PM
oral
Signal estimation in the presence of background noise is a common problem in several scientific disciplines. An “on/off” measurement is performed when the background itself is not known, being estimated from a background control sample. In this work, we devise a novel reconstruction method, Bayesian analysis including single-event likelihoods (dubbed BASiL), for estimating the signal rate...
Yusuke Suda
(Hiroshima University)
10/27/21, 3:00 PM
oral
TeV gamma-ray telescopes are the established energy frontier in gamma-ray burst study. Starting from a bright long GRB 190114C detected by the MAGIC telescopes, there are three published long GRB detections together with the H.E.S.S. In order to understand this newly revealed nature of GRBs, further detections are longing and investigation with a large sample of non-detected GRBs is important....
Giada MANCINI
(Frascati)
10/27/21, 3:00 PM
oral
With the full Run 2 pp collision dataset collected at 13 TeV, very detailed measurements of Higgs boson properties and its interactions can be performed using its decays into bosons and fermions. These measurements are combined allowing to reach the highest possible measurement precision. This talk presents the latest measurements of the Higgs boson properties by the ATLAS experiment in...
Dr
Naveen Kumar
(Max-Planck Institute for Nuclear Physics)
10/27/21, 3:00 PM
oral
Electron and ion acceleration at a non-relativistic collisionless shocks is studied by employing large scale one-dimensional particle-in-cell (PIC) simulations in the de-Hoffmann and Teller (dHT) frame of reference. We demonstrate that diffusive shock acceleration of both electrons and ions occurs in quasi-perpendicular shock configurations at large Alfvén Mach numbers. We also identify the...
Robert Brose
(Dublin Institute of Advanced Studies)
10/27/21, 3:20 PM
oral
Supernova remnants are known to accelerate cosmic rays (CRs) on account of their non-thermal emission of radio waves, X-rays, and gamma rays. However, the ability to accelerate CRs up to PeV-energies has yet to be demonstrated. The presence of cut-offs in the gamma-ray spectra of several young SNRs led to the idea that PeV energies might only be achieved during the very initial stages of a...
Hanwen Wang
(Beihang University)
10/27/21, 3:20 PM
oral
The width and the structure of its couplings to the known SM particles is very important to determine whether 125GeV Higgs is the SM Higgs boson. The off-shell technique provides unique way to measure the Higgs boson width and probe the small anomalous couplings which are allowed in SM. In this talk, a recent measurement on the Higgs width and anomalous couplings with the ZZ decay channel is presented.
Mr
Zhiqiu Huang
(MPIK)
10/27/21, 3:20 PM
oral
We revisit the external shock picture of gamma-ray burst afterglow models, in light of recent very-high-energy gamma-ray detection from GRB190829A. The maximum electron energy achievable at an ultra-relativistic weakly-magnetized shock is thought to proceed in the "ballistic" transport regime. This limits synchrotron photons to energies below the often assumed burn-off limit. A single zone...
Saptashwa Bhattacharyya
(University of Nova Gorica)
10/27/21, 3:25 PM
oral
Due to the dominating presence of diffuse emission at GeV energies, detecting and localizing (faint) gamma-ray point sources in the Fermi-LAT data is a challenging task. Going beyond traditional statistical methods, here we show the application of deep learning and computer vision algorithms to localize and classify gamma-ray point sources starting from the raw Fermi-LAT sky images. We prepare...
Ms
Samata Das
(DESY, Institute of Physics and Astronomy, University of Potsdam, Germany)
10/27/21, 3:40 PM
oral
**Context.** Supernova Remnants (SNRs) are considered as the primary sources of galactic cosmic rays (CRs), accelerated by diffusive shock acceleration (DSA) mechanism at SNR shocks. The core-collapse SNRs expand in the complex ambient environment, inside wind-blown bubbles created by the mass-loss of massive stars during their different evolutionary stages. Therefore, the evolution of...
Ilaria Viale
(University and INFN Padova)
10/27/21, 4:00 PM
oral
The evidence for multi-messenger photon and neutrino emission from the blazar TXS 0506+056 has been a major success for the astrophysical community, reached thanks to a powerful strategy of real-time follow-up of neutrino events. The effort of MAGIC and other experiments in coordinating observations to obtain contemporaneous multiwavelength (MWL) flux and spectral measurements was key for...
Domenico della Volpe
(University of Geneva)
10/27/21, 4:15 PM
oral
The contribution will present the status of the project and some highlights of the first observational data.
Yanlin Liu
(Michigan)
10/27/21, 4:20 PM
oral
The latest results on the production of Higgs boson pairs (HH) in the ATLAS experiment are reported, with emphasis on searches based on the full LHC Run 2 dataset at 13 TeV. In the case of non-resonant HH searches, results are interpreted both in terms of sensitivity to the Standard Model and as limits on the Higgs boson self-coupling. Search results on new resonances decaying into pairs of...
Serena Loporchio
(I)
10/27/21, 4:20 PM
oral
BL Lac objects which possess a synchrotron peak at unusually high X-ray frequencies (peak_S ≥10^17 Hz) were categorized as extreme high-frequency BL Lacs (EHBLs) by Costamante et al. (2001). As a consequence of the location of the synchrotron peak, the inverse Compton hump of EHBLs is expected to peak in the gamma-ray band, making them interesting targets for very-high-energy gamma rays...
Ottavio Fornieri
(The Gran Sasso Science Institute)
10/27/21, 4:40 PM
oral
We present the phenomenological implications of the micro-physics of CR diffusion as resulting from particle scattering onto the three modes in which \textit{Magneto-Hydro-Dynamics} (MHD) cascades are decomposed. We calculate the diffusion coefficients from first principles based on reasonable choices of the physical quantities characterizing the different environments of our Galaxy, namely...
Dr
Saverio Lombardi
(INAF-OAR and ASI-SSDC)
10/27/21, 4:40 PM
oral
The ASTRI Mini-Array is a next-generation Imaging Atmospheric Cherenkov Telescopes (IACTs) facility for gamma-ray astronomy in the energy band from a few TeV up to 100 TeV and beyond, under construction at the Teide Observatory (in the Canary Island of Tenerife, Spain). The project is led by the Italian *Istituto Nazionale di Astrofisica* (INAF) in collaboration with the *Fundación Galileo...
Benedikt Schroer
(G)
10/27/21, 5:00 PM
oral
In the typical picture of cosmic ray transport in the region around their sources cosmic rays escape along the local magnetic field lines. We investigate this phenomenon using 2D and 3D hybrid particle-in-cell simulations.
The escaping cosmic rays excite resonant and non-resonant streaming instabilities resulting in enhanced particle scattering. This leads to a large pressure gradient that...
Dr
Vitalii Sliusar
(University of Geneva)
10/27/21, 5:00 PM
oral
Markarian 421 (Mrk 421) and Markarian 501 (Mrk 501) are two close bright and well-studied high-synchrotron-peaked blazars, which feature bright and persistent GeV and TeV emission. We use the longest and densest dataset of unbiased observations of these two sources, obtained at TeV and GeV energies during 5 years with the FACT telescope and Fermi LAT. To characterize the variability and derive...
Gwenael Giacinti
(SWGO Collaboration)
10/27/21, 5:05 PM
oral
The Southern Wide-field Gamma-ray Observatory (SWGO) is the project to build a new extensive air shower particle detector for the observation of very-high-energy gamma-rays in South America. SWGO is currently planned for installation in the Southern Hemisphere, which grants it a unique science potential among ground-based gamma-ray
detectors. It will complement the capabilities of CTA,...
Axel Arbet-Engels
(Max Planck Institute for Physics)
10/27/21, 5:20 PM
oral
Thanks to its brightness and proximity, the BL Lac type object Mrk 421 is an ideal target to probe blazar jet physics. We present a detailed characterisation and theoretical interpretation of the broadband emission of Mrk 421, focusing on the multi-band flux correlations. The analysis makes use of an extensive multi-wavelength campaign organised in 2017, during which the correlation patterns...
Stefano Vercellone
(I)
10/27/21, 5:30 PM
oral
Celestial sources emitting at high-energy (HE, E>100 MeV) and at very high-energy (VHE, E>100 GeV) are of the order of a few thousands and a few hundreds, respectively. The number of sources emitting at ultra high-energy (UHE, E> several tens of TeV) are just a few dozen, and are currently being investigated by means of both ground-based imaging atmospheric Cherenkov telescopes (IACTs) and...
Dr
Francesco de Palma
(UniSalento & INFN Lecce)
10/27/21, 5:40 PM
oral
QSO B0218+357 (z = 0.944±0.002 ) is currently the only gravitationally lensed source from which very-high-energy (VHE, >~100GeV) gamma-ray emission has been detected. We report the Fermi-LAT monitoring of the source between 2016 and 2020 in conjunction with multiwavelength monitoring observations in radio interferometry and in the optical, X-ray, and VHE ranges. During the monitoring,...
Tomislav Terzić
(University of Rijeka, Department of PhysicsU)
10/27/21, 5:55 PM
oral
Lorentz invariance violation (LIV) is an exciting possible consequence of Quantum Gravity (QG). Detecting and measuring LIV would pose an invaluable input for understanding the nature of QG, and suggest a direction for further development of theoretical models describing it. If Lorentz symmetry is indeed violated, the effects thereof are minuscule, but cumulative. Therefore, very high energy...
Mr
Mahmoud Alawashra
(University of Potsdam)
10/27/21, 6:00 PM
oral
We constrain the intermediate-scale intergalactic magnetic field (IGMF) through its suppression of the electrostatic instability for blazar-induced pair beams. IGMF of Femto-Gauss strength is sufficient to significantly deflect the TeV pair beams, which reduces the flux of secondary cascade emission below the observational limits. A similar flux reduction may result from the electrostatic...
Dr
Yue Meng
(Shanghai Jiao Tong University)
10/27/21, 8:30 PM
oral
The dark matter exists from many cosmological indirect evidences. In order to search dark matter directly, energy deposition due to interactions between dark matters and normal matters can be measured with multiple advanced techniques. This talk will summarize the current and planned dark matter direct detection experiments with dark matter mass range from $\rm MeV/c^2$ to $\rm TeV/c^2$,...
Dr
Yunlong Zhang
(University of Science and Technology of China)
10/27/21, 9:00 PM
oral
The Dark Matter Particle Explorer (DAMPE), primarily designed to directly measure high energy cosmic rays and gammas in space, was launched into 500 km orbit successfully on December 17th, 2017, and, since then, it is in continuous data taking. DAMPE consists four sub-detectors: top layers of plastic scintillators as a charged measurement detector, a 12 layers silicon strip tracker, an imaging...
Prof.
Shoji Torii
(Waseda University)
10/27/21, 9:30 PM
oral
The CALorimetric Electron Telescope (CALET), developed and operated by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics experiment installed on the International Space Station (ISS). Its mission goals include investigating the possible presence of nearby sources of high-energy electrons, performing direct measurements of observables sensitive to...
Ting Li
(University of Toronto)
10/27/21, 10:05 PM
oral
Astrophysical and cosmological observations currently provide the only robust, empirical measurements of dark matter. Astronomical observations with large-scale surveys can provide necessary guidance for the experimental dark matter program. In this talk, I will summarize astrophysical observations that can constrain the fundamental physics of dark matter in the era of modern surveys. I will...
Prof.
Maxim Pospelov
(University of Minnesota)
10/27/21, 10:35 PM
oral
Light (e.g. sub-GeV) WIMPs might be a viable model if the Standard Model is extended by new dark sector degrees of freedom. Many of these dark matter candidates would fall below the thresholds of direct detection experiments. I present new results on (almost) model-independent constraints on properties of dark matter that utilize A. Acceleration of light dark matter via collision with...
Daniel Egana-Ugrinovic
(Perimeter Institute)
10/27/21, 11:05 PM
oral
In recent years, the search for dark matter with sub-GeV masses has been targeted by a variety of novel experiments with unprecedented sensitivity to low energy depositions.
In this talk, we review the theoretical motivations behind these experiments and the challenges that need to be overcome in order to make a leap forward in detection reach.
In particular, we discuss new explanations...
Dr
Rui Xue
(Zhejiang Normal University)
10/28/21, 8:30 AM
oral
In this work, we develop a self-consistent multi-zone model to describe the time-dependent multi-wavelength emission of blazars. Based on Very Long Baseline Array observations of M 87 jet, we speculate and assume that numerous discrete emission zones throughout the jet of a blazar. We model the temporal evolution of the electron spectrum in each emission zone taking into account the injection,...
Mr
Ben Li
(Nanjing University)
10/28/21, 8:30 AM
oral
The detection of extended TeV γ-ray emission (dubbed “TeV halos”) from Geminga and Monogem pulsars by HAWC collaboration implies that the halo-like morphologies around middle-aged pulsarsmay be common. The γ-rays above 10 TeV are thought to arise from inverse Compton (IC) scattering of relativistic electrons/positrons in the pulsar halos off cosmic microwave background photons. In...
Zerui WANG
(Qilu Normal University)
10/28/21, 8:50 AM
oral
Blazars are a class of active galactic nuclei which host relativistic jets oriented close to the observer's line of sight. Blazars have very complex variability properties. Flares, namely flux variations around the mean value with a well-defined shape and duration, are one of the identifying properties of the blazar phenomenon. Blazars are known to exhibit multi-wavelength flares, but also...
Ramiro Torres-Escobedo
(SJTU, HAWC Collaboration)
10/28/21, 8:50 AM
oral
The local positron excess above 10 GeV measured by PAMELA, Fermi-LAT, and AMS-02 remains an essential question in the field of astroparticle physics. Dark matter particle decay/annihilation presents a viable mechanism to explain this positron excess. However, pulsars are also emitters of electrons/positrons. The HAWC collaboration studied the contribution from two-mid aged pulsars, Geminga and...
Dr
Qizuo WU
(Nanjing University)
10/28/21, 9:10 AM
oral
Extended TeV gamma-ray emission, which is also referred to as the TeV halo, has been discovered around the Geminga pulsar and a few other middle-aged pulsars. It is believed that the gamma-ray pulsar halo arises from the inverse Compton radiation of relativistic electrons escaping from the pulsar wind nebula. Therefore, the transport mechanism of these escaping electrons is crucial to...
Tomohisa Kawashima
(ICRR, U of Tokyo)
10/28/21, 9:10 AM
oral
The Event Horizon Telescope (EHT) detected the black hole shadow in the elliptical galaxy M87*. This provided powerful evidence of the presence of supermassive black holes and the mass of the black hole was estimated to be ~6.5 billion solar mass.
For revealthe magnitude of the black hole spin and the dynamics of relativistic jets and accretion flows near the event horizon by future EHT...
Mr
Xuan-Han Liang
(Nanjing University)
10/28/21, 9:30 AM
oral
The Boomerang Nebula, a pulsar wind nebula associated with the supernova remnant G106.3+2.7, is a possible counterpart of the ultrahigh-energy gamma-ray source LHAASO J2226+6057. The SNR-PWN complex is considered as a PeVatron candidate, acting as a factory accelerating particles to PeV energies. In this work, we model the extended nonthermal X-ray emission around the pulsar PSR J2229+6114,...
Prof.
Zhongxiang Wang
(Yunnan University)
10/28/21, 9:50 AM
oral
We will present a γ-ray enhancement event detected from Tycho’s supernova remnant (SNR), which lasted for 1.5
years and showed a factor of 3.6 flux increase mainly in the energy range of 4–500 GeV. While several young SNRs (including Tycho’s SNR) were previously found to show peculiar X-ray structures with flux variations in one- or several-year timescales, such an event at γ-ray energies is...
Dr
Xin-Yue Shi
(Nanjing University)
10/28/21, 10:10 AM
oral
High-energy cosmic rays (CRs) can be accelerated in the relativistic jets of Active Galactic Nuclei (AGNs) powered by supermassive black holes.
The baryon loading efficiency onto relativistic CR baryons from the accreting black holes is poorly constrained by observations so far. In this presentation, we suggest that the $\gamma$-ray emission of galaxy clusters can be used to study the baryon...
Mr
xiao zhang
(Nanjing University)
10/28/21, 10:10 AM
oral
SNR G35.6-0.4 shows complex components in the radio bands and partially overlaps in space with an unidentified TeV source HESS J1858+020. In this study, we reanalyze CO, HI, and Fermi data toward SNR G35.6-0.4 region. The results obtained from the CO and HI data suggest that SNR G35.6-0.4 and HII region G35.6-0.5 locate at different distances. Based on the Fermi data, a GeV source (SrcB) is...
Mr
Ryo Imazawa
(Hiroshima University)
10/28/21, 10:30 AM
oral
M87 is one of the nearest radio galaxy. We can study the core, jet, and some components by radio to X-ray observations.
Regarding TeV gamma ray observations, it is known to show an intra-day variability.
Such fast variability may occur at the particle acceleration region. But due to rough angular resolution, we cannot know which component causes this variability.
We searched for fast X-ray...
Kosuke Nishiwaki
(Institute for Cosmic-Ray Research)
10/28/21, 10:50 AM
oral
Galaxy clusters can work as gigantic reservoirs of cosmic rays, and they are considered to be possible sources of the IceCube neutrinos.
Some clusters are found with extended radio emission called radio halos, which provides crucial information about the non-thermal components in the intra-cluster medium. We study the high-energy emission from the galaxy clusters considering the constraints...
Qinrui Liu
(University of Wisconsin)
10/28/21, 9:00 PM
oral
The IceCube Neutrino Observatory consists of one cubic kilometer of deep transparent Antarctic ice that has been transformed into a neutrino telescope at the South Pole. It has been operating in its full configuration for the past 10 years. TeV-PeV neutrinos of cosmic origin have been discovered with an energy flux comparable to that of gamma rays and cosmic rays. High-energy neutrinos are...
Dr
Olga Suvorova
(Institute for Nuclear Research. of the Russian Academy of Sciences)
10/28/21, 9:30 PM
oral
The progress in the construction and operation of the Baikal-GVD is reported. The detector is designed for search for high energy neutrinos whose sources are not yet reliably identified. It currently includes 2304 optical modules arranged on 64 strings, providing an effective volume of 0.4 km3 for cascades with energy above 100 TeV. We review the scientific
case for Baikal-GVD, the...
Rodrigo Guedes Lang
(E)
10/28/21, 10:05 PM
oral
Ultra-high-energy cosmic rays (UHECR) are the most energetic known particles of the Universe, being accelerated to energies up to 7 orders of magnitude higher than those achieved in human-made accelerators. Their origins, however, remain an intriguing puzzle even decades after their discovery. In this review, the current status of this puzzle will be presented, discussing the latest...
Prof.
Douglas Bergman
(University of Utah)
10/28/21, 10:35 PM
oral
The Telescope Array (TA) is an ultra-high energy cosmic ray detector, the largest in the Northern Hemisphere, sensitive to cosmic rays with energies from 1 PeV to above 100 EeV. The main detector is a hybrid detector consisting of an array of 507 surface detectors covering 700 km$^2$ overlooked by three fluorescence telescope detector stations. The energy range has been extended at the low end...
Prof.
Bruce Dawson
(University of Adelaide)
10/28/21, 11:05 PM
oral
Our understanding of the characteristics of the highest energy cosmic rays has improved enormously with the operation of the Pierre Auger Observatory, situated in western Argentina. Its extremely large collecting area (3000 square kilometres), coupled with the layers of cross-checks provided by two fundamentally different detection techniques (surface and fluorescence detectors) has led to...
Cowen Doug
(The Pennsylvania State University)
10/29/21, 8:40 AM
oral
Kilometer-scale neutrino detectors, like the IceCube Neutrino Observatory deployed in the ice cap at the South Pole, are uniquely capable of detecting astrophysical tau neutrinos. IceCube has sensitivity to tau neutrinos with energies at and well above the threshold for tau lepton production, and has sufficiently large volume to contain tau leptons that travel hundreds of meters. The...
Lingfeng Li
(Brown University)
10/29/21, 8:50 AM
oral
We studied the phenomenology and experimental searches of the dark pions, which are the lightest hadrons in a hidden sector confining gauge theory. Such a scenario arises in many extensions of the Standard Model (SM). We consider that the leading interactions between the light hidden sector quarks and the SM particles come from the mixing of the light hidden quarks with heavy electroweak...
Pavel Zhelnin
(Harvard University)
10/29/21, 9:00 AM
oral
IceCube’s discovery of astrophysical neutrinos, and subsequent characterization of their energy spectrum up to a few PeV, has provided a new window to the high-energy Universe. A series of next-generation experiments aim to discover neutrinos with ultra-high energies, optimizing their sensitivity in the EeV range. However, many opportunities for discovery still remain in the study of the...
Susumu Inoue
(Bunkyo U. / RIKEN)
10/29/21, 9:25 AM
oral
Powerful, broadly collimated winds, likely driven by accretion disks around supermassive black holes (BHs), are observed in the majority of active galactic nuclei (AGN) and can play a crucial role in the evolution of AGN and their host galaxies. If some of the wind power is dissipated by shocks near the BH, protons can be thereby accelerated and undergo $p\gamma$ interactions with the AGN...
Mehr Un Nisa
(IceCube Neutrino Observatory)
10/29/21, 10:30 AM
oral
The originating sites of astrophysical neutrinos, diffuse extragalactic gamma rays, and ultra-high energy cosmic rays remain a largely unresolved puzzle. One class of astrophysical objects that could potentially provide a unified solution to the aforementioned mystery is galaxy clusters. Clusters of galaxies have been hypothesized as reservoirs of accelerated cosmic rays, which can interact...
Aswathi Balagopal V.
(IceCube Neutrino Observatory)
10/29/21, 10:50 AM
oral
The IceCube Neutrino Observatory observes neutrinos of both
astrophysical and atmospheric origin with energies above 100s of GeV.
DeepCore, the dense infill array of IceCube, also allows us to probe
neutrinos with lower energies, down to a few GeV. Using high energy (>1
TeV) and low energy (< 1 TeV) datasets curated for the search of
astrophysical sources, we can conduct follow-up...
Dr
Quanbu Gou
(Institute of High Energy Physics, CAS)
10/29/21, 11:10 AM
oral
High-energy transients, e.g., gamma-ray bursts (GRBs), supernovae, and blazars, are potential sources of high-energy cosmic rays. Neutrinos are a good probe of the origin of cosmic rays.
Horizontal air showers (HAS) are expected to be initiated by deeply penetrating high en-ergy particles such as neutrinos. Indeed, at large zenith angles the electromagnetic com-ponent of ordinary air showers...
Ibrahim Safa
(University of Wisconsin)
10/29/21, 11:30 AM
oral
Ultra-high energy neutrinos (>10^16 GeV) are expected to be produced through cosmic-ray interactions with the Cosmic Microwave Background (CMB). This so-called cosmogenic flux of UHE neutrinos is a target of the next generation neutrino observatories: IceCube-Gen2, TAMBO, RNOG, GRAND, POEMMA, and CHANT. Many of these detectors rely on measuring the neutrino interaction either directly at the...
Marco Kuhlen
(TTK Institute, RWTH-Aachen)
10/29/21, 3:00 PM
oral
In the standard picture of cosmic ray transport the propagation of charged cosmic rays through turbulent magnetic fields is described as a random walk with cosmic rays scattering on magnetic field turbulence. This is in good agreement with the highly isotropic arrival directions as this diffusion process effectively isotropizes the cosmic ray distribution. However, high-statistics...
Rajesh Kumar Maiti
(H)
10/29/21, 3:00 PM
oral
The Belle II experiment is in the unique position of probing a yet uncharted sector of particle physics, which includes hypothetical particles coupling very weekly with the standard model ones that might help explaining the nature of dark matter and other anomalies. Belle II analyzed 0.5 fb-1 of commissioning data to exclude part of the parameter space of models including low mass Z' bosons...
Mr
Yannis Georis
(Université Catholique de Louvain)
10/29/21, 3:00 PM
oral
In this talk, we present a new comprehensive study of the allowed parameter space within which type-I seesaw-based leptogenesis with three heavy neutrinos is possible. We include both freeze-in (ARS leptogenesis) and freeze-out (resonant leptogenesis) mechanisms. We show that, in presence of an approximately degenerate heavy neutrino mass spectrum, leptogenesis is feasible accross the whole...
Oleg Samoylov
(Joint Institute for Nuclear Research)
10/29/21, 3:00 PM
oral
The NOvA experiment is aimed to solve the fundamental neutrino problems: precise determination of neutrino oscillation parameters, determination of neutrino mass hierarchy, search for the CP-violation in the leptonic sector. NOvA consists of the near detector on the Fermi National Laboratory site, where the muon neutrinos are produced in the NuMI accelerator complex, and the far detector...
Prof.
Bo-Qiang Ma
(Peking University)
10/29/21, 3:20 PM
oral
The Large High Altitude Air Shower Observatory~(LHAASO) is one of the most sensitive gamma-ray detector arrays currently operating at TeV and PeV energies. Recently the LHAASO experiment detected ultra-high-energy~(UHE) photon emissions up to $1.4~\mathrm{PeV}$ from twelve astrophysical gamma-ray sources. We point out that the detection of cosmic photons at such energies can constrain the...
Stefano Di Lorenzo
(L)
10/29/21, 3:20 PM
oral
Latest results from the CUORE experiment
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics...
Gwenael Giacinti
(MPIK Heidelberg)
10/29/21, 3:20 PM
oral
We calculate the shape of the TeV-PeV cosmic-ray anisotropy (CRA) in 3D Kolmogorov turbulence. We present the first numerical calculations of the CRA down to TeV energies, using realistic values for the coherence length of the interstellar turbulence. At these low energies, the large-scale CRA aligns with the direction of local magnetic field lines around the observer. In this type of...
Chiara Lucarelli
(CERN)
10/29/21, 3:40 PM
oral
Antimatter in cosmic rays is a powerful probe for the indirect
detection of Dark Matter. To constrain the background from secondary antiparticles, produced during cosmic ray propagation through the interstellar medium, the related cross sections need to be determined more precisely at accelerator facilities. The LHCb experiment currently offers the unique fixed-target facility exploiting the...
Deepak Kumar
(CERN)
10/29/21, 3:40 PM
oral
Dark matter can be sought in complementary experiments: direct detection, indirect detection and colliders all contribute to a comprehensive set of searches for weakly interacting massive particles (WIMPs). This talk presents the latest results from the searches for Dark Matter by the CMS experiment.
Julien Dörner
(Ruhr-University Bochum)
10/29/21, 3:40 PM
oral
The propagation of cosmic rays can be described as a diffusive motion in most galactic environments. The Milky Way and its cosmic-ray distribution have been studied in detail by the measurement of high-energy gamma-rays with Fermi. A gradient in the cosmic-ray density and spectral energy behavior has been measured indirectly this way and is in need of explanation.
In this talk we use recent...
Cristina Lagunas Gualda
(IceCube)
10/29/21, 3:40 PM
oral
The IceCube Neutrino Observatory is the world largest neutrino telescope, instrumenting one cubic kilometre of Antarctic ice. IceCube started its operation in 2011 and a diffuse flux of neutrino was discovered in 2013. To this day the sources of those neutrinos are still largely unknown. One of the most promising neutrino source candidates are blazars, Active Galactic Nuclei with jets aligned...
155.
Searches for dark matter with the ATLAS detector (joint abstract from Exotics, Higgs, and SUSY)
Changqiao LI
(中国科学技术大学)
10/29/21, 4:00 PM
oral
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS experiment has developed a broad search program for DM candidates, including resonance searches for the mediator which would couple DM to the SM,...
Malgorzata Kazana
(N)
10/29/21, 4:00 PM
oral
New particles with long lifetimes are introduced by many extensions to the standard model and would produce striking and non-conventional signatures in collider experiments such as long-lived charged particles, highly displaced jets, and particles that come to a rest within the detector and later decay. We present the results of several recent searches for long-lived particles with the CMS...
Annarita Margiotta
(I)
10/29/21, 4:00 PM
oral
KM3NeT is a deep-sea infrastructure mainly devoted to the detection of neutrinos over a large range of energy. It hosts two Cherenkov neutrino telescopes in different sites of the Mediterranean Sea: ARCA, located at 3500 m sea depth, offshore Sicily, will look for high energy neutrinos coming from astrophysical sources; ORCA, installed 2500 m under the sea level, in front of the Provencal...
Ruben Lopez-Coto
(I)
10/29/21, 4:20 PM
poster
The search for Primordial Black Hole (PBH) signatures is very broad in techniques, the origin of these signatures and in theories of PBH formation. Searches for imprints of evaporation involve several observables such as the Extragalactic Gamma-Ray background or direct measurement of different species of cosmic rays. Using these observables, one can put very tight constraints on the PBH...
Sergio Grancagnolo
(CERN)
10/29/21, 4:20 PM
oral
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures which are difficult to reconstruct and for which estimating the background rates is also a challenge. Signatures from displaced and/or delayed decays anywhere from the inner detector to the muon spectrometer, as well as those of new particles with fractional or multiple values of the charge of...
Dr
Colton Hill
(Chiba University)
10/29/21, 4:40 PM
oral
The IceCube Upgrade involves development of several new optical modules:dual-PMT (D-Eggs), multi-PMT (mDOMs), and upgraded traditional modules (pDOMs). In particular, the D-Eggs offer a high-efficiency and cost-effective solution compared to original IceCube modules. Results extracted from the IceCube Upgrade will compliment low energy analyses, as well as be a key component of the upcoming...
Dr
Juan Wu
(China University of Geosciences)
10/29/21, 4:40 PM
oral
Thanks to the precise cosmic ray data measured by recent
space experiments, we are able to investigate the cosmic ray acceleration and propagation mod-
els more comprehensively and reliably. In this work, we combine the secondary-to-primary ratio
and the primary spectra measured by PAMELA, AMS02, ACE-CRIS and Voyager-1 to constrain
the cosmic ray source and transport parameters. The study...
Fei Gao
(Tsinghua University)
10/29/21, 4:40 PM
oral
To date, dark matter (DM) has only been observed through its gravitational interaction. Detection of a DM signal in an ultra-low background terrestrial detector will represent a ground-breaking discovery in physics and cosmology. The XENON collaboration has pioneered the development of liquid xenon time projection chambers and built a series of such detectors to lead the search for DM...
Peter BERTA
(Prague CU)
10/29/21, 5:00 PM
oral
The remarkably large integrated luminosity collected by the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to test theoretical predictions with unprecedented precision. Using data taken with the ATLAS detector at the LHC, recent measurements of total and differential top-quark cross sections as well properties of...
Scutti Federico
(The Australian National University)
10/29/21, 5:00 PM
oral
The SABRE (Sodium iodide with Active Background REjection) experiments aim to detect an annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals. The SABRE South experiment is located at the Stawell Underground Physics Laboratory (SUPL), Australia, and is the first deep underground laboratory in the Southern Hemisphere, due to be completed in late 2021.
...
Pedro De la Torre Luque
(Stockholms universitet)
10/29/21, 5:00 PM
oral
he propagation of Galactic cosmic rays (CRs) is commonly studied as a diffusive movement which can be evaluated from the spectra of secondary CRs. While the accuracy of current CR data allows us to precisely test our propagation models, the precision of cross sections data for the production of secondary CRs is very poor (>20%), considerably limiting these tests.
In this talk we explore the...
Christian Spannfellner
(Technical University Munich)
10/29/21, 5:05 PM
oral
The Pacific Ocean Neutrino Experiment (P-ONE) initiative strives to push the boundaries of high-energy astronomy by creating a next-generation, large-scale neutrino telescope. In this process, P-ONE benefits highly from an already existing deep-sea infrastructure, the NEPTUNE observatory, established and in operation by Ocean Networks Canada (ONC). NEPTUNE provides power and data connections...
Marcella Bona
(Queen Mary University of London)
10/29/21, 5:20 PM
oral
The ATLAS experiment has performed measurements of B-meson rare decays proceeding via suppressed electroweak flavour changing neutral currents, and of mixing and CP violation in the neutral Bs meson system. This talk will focus on the latest results from the ATLAS collaboration, such as rare processes B0s → mu mu and B0 → mu mu, and CP violation in the B0s —> J/psi phi decays. In the latter,...
Dr
Xiao Wang
(Sun Yat-sen University)
10/29/21, 5:20 PM
oral
The energy budget of cosmological first-order phase transition is essential for the gravitational wave spectra. Most of the previous studies are based on the bag model with same sound velocity in the symmetric and broken phase. We study the energy budget and the corresponding gravitational wave spectra beyond the bag model, where the sound velocities could be different in the symmetric and...
Lisa Schumacher
(Technical University Munich)
10/29/21, 5:30 PM
oral
High-energy astrophysical neutrinos, discovered by IceCube, are now regularly observed. The observation rate remains small due to their low flux, such that open questions about high-energy neutrino astrophysics and particle physics remain limited by statistics at best, or unanswered at worst. Fortunately, this situation will improve in the next years: new neutrino telescopes will come online,...
Bohua Li
(Tsinghua University)
10/29/21, 5:40 PM
oral
The recent NANOGrav finding of a common-spectrum process has invited interpretations as possible evidence of a primordial stochastic gravitational-wave background (SGWB)
stronger than predicted by standard inflation + $\Lambda$CDM. Such an SGWB would contribute an extra radiation component to the background Universe which may affect its expansion history. As such, it may help alleviate the...
Angela Maria BURGER
(Oklahoma SU)
10/29/21, 5:40 PM
oral
Many theories beyond the Standard Model predict new phenomena, such as heavy vectors or scalar, and vector-like quarks, in final states containing bottom or top quarks. Such final states offer great potential to reduce the Standard Model background, although with significant challenges in reconstructing and identifying the decay products and modelling the remaining background. The recent 13...
Dr
Guo-yuan Huang
(MPIK, Heidelberg, Germany)
10/29/21, 5:55 PM
oral
We explore the new physics scenarios case by case that can
modify the interactions between neutrinos and matter at future tau neutrino telescopes. Recent progress of multimessenger astronomy, especially the ultra-high-energy neutrino observations at IceCube, has sparked a campaign towards neutrino detection at extreme energies around
the Greisen-Zatsepin-Kuzmin cutoff around 10^9 GeV. A...
Elliot REYNOLDS
(Berkeley LBNL)
10/29/21, 6:00 PM
oral
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the Standard Model addressing such shortcomings introduce additional Higgs-like bosons which can be either...
Prof.
Tulika Bose
(University of Wisconsin-Madison)
10/29/21, 9:30 PM
oral
This talk will present an overview of LHC results on the dark sector.
Meg Millhouse
(University of Melbourne)
10/29/21, 10:05 PM
oral
The Advanced LIGO, Virgo, and KAGRA gravitational-wave detectors have now completed three observing runs, and reported dozens of detections from compact binary mergers. This talk will give an overview the current gravitational-wave detections, including events of particular scientific interest such as two possible neutron star-black hole binaries and the most massive black hole binary system...
Cristiano Palomba
(INFN Rome Division)
10/29/21, 10:35 PM
oral
Dark photons with masses in the range of 1e-14 — 1e-11 eV could interact with the optical components of the gravitational-wave detectors, producing a potentially detectable stochastic and narrow-band signal. In this talk, I will present methodologies and results for a recent dark photon search carried out using the data collected in the third observing run of Advanced LIGO and Virgo. Although...
Dr
Ornella Juliana.Piccinni
(National Institute for Nuclear Physics Rome Division)
10/29/21, 11:05 PM
oral
Formed after the collapse of a massive star and the following
supernova explosion, supernova remnants hosting potential young neutron stars are ideal targets for searches for continuous gravitational waves.
Astronomical catalogues like the Green supernova catalogue and the online high-energy galactic supernova remnant catalogue (SNRcat), provide accurate information about the sky position...
