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16-21 August 2019
Guilin Bravo Hotel, Guilin, China
Asia/Shanghai timezone
Home > Contribution List

Contribution List

Displaying 228 contributions out of 228
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
Recent experimental observations of charged charmonium- and bottomonium-like structures have brought lots of excitements in the field of hadron spectroscopy. If these structures are associated with the existence of the corresponding hadrons, these states includes minimally two quarks and two antiquarks, being objects clearly beyond the conventional quark model picture. Such charged charmonium-like ... More
Presented by Dr. Satoshi NAKAMURA on 20 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
We employ the heavy hadron chiral perturbation theory (HHChPT) to calculate the $\Sigma_c\bar{D}^{(\ast)}$ potentials to the next-to-leading order. The contact, the one-pion exchange and the two-pion exchange interactions are included. We keep the mass splittings between the heavy quark spin symmetry (HQSS) multiplets in calculation. We show that neglecting the heavy quark symmetry (HQS) violation ... More
Presented by Mr. Lu MENG on 20 Aug 2019 at 5:20 PM
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
I report on our study of low-lying resonances in $\pi\pi$ and $K\pi$ scattering from lattice QCD. Based on ab-initio multi-hadron spectroscopy and the Lüscher finite-volume method, we have investigated the elastic scattering amplitudes for $\pi\pi$ P-wave, $K\pi$ S-wave and P-wave partial waves. A particular focus of the discussion will be the parametrizaton of the amplitudes with respect to ... More
Presented by Marcus PETSCHLIES on 20 Aug 2019 at 2:00 PM
Type: Poster Track: Posters
Based on holographic correspondence Brodsky and de Teramond suggested a procedure to relate AdS modes with meson wave functions. In the original papers authors considered hard wall models and Soft wall models with quadratic dilaton. In this poster we shows alternatives to obtain meson wave functions beyond the traditional cases considering other dilatons.
Presented by Dr. Alfredo VEGA
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The quark model has been applied with considerable success to mass spectra, strong and electromagnetic decays of hadrons. In these approaches only the degrees of freedom of the valence quark are retained, thus the pions are simply treated as interacting $q\bar{q}$ pairs, which are identical to the $\rho$ mesons except for the spin quantum number. Meanwhile, from the point of view of QCD the pions ... More
Presented by Kenji YAMADA on 21 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The space-time properties of the excited nucleons may provide useful information to test the non-perturbative QCD models attempting to describe the hadron production process. In this work we attempt to measure the excited baryon Δ(1232)‘s radius using Bose-Einstein correlations (BEC) between two neutral pions from photo-production off a hydrogen/deuterium target at the incident photon energies ... More
Presented by Qinghua HE on 17 Aug 2019 at 2:55 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The Generalized Parton Distributions (GPDs) are the appropriate framework for a universal description of the partonic structure of the nucleon. Encoding the correlations between the elementary constituents of the nucleon, GPDs allow a 3-dimensional imaging of the nucleon from the dynamical link between the transverse position and the longitudinal momentum of partons. Double Deeply Virtual Compton ... More
Presented by Mr. Shengying ZHAO on 20 Aug 2019 at 9:15 AM
Type: Leading parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
I will review recent results on hadron spectroscopy analyses from JPAC
Presented by Prof. Adam SZCZEPANIAK on 20 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
First I will present an novel approach on semileptonic decays of meson with charm or beauty flavors. This novel approach was recently developed and we used a different method than in conventional approaches. Using only one experimental decay rate in the B or D sectors, the rates for the rest of decay modes are predicted and they are in good agreement with experiment. Then an interesting appl ... More
Presented by Lianrong DAI on 17 Aug 2019 at 5:30 PM
Type: Plenary Session: Plenary session
Track: Plenary
This talk reviews the recent progress in developing analysis tools for resonances searching.
Presented by Dr. Alessandro PILLONI on 19 Aug 2019 at 9:40 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The associated production of vector boson with quarkonia is a key observable for understanding the quarkonium production mechanisms, including the separation of single and double parton scattering components. This talk will present the latest measurements from ATLAS on quarkonium production, including associated production.
Presented by Tamar ZAKAREISHVILI on 18 Aug 2019 at 2:25 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
Nucleons, fundamental blocks of the world, carry almost all mass of the visible Universe. In Standard Model, nucleons are bound states of quarks and gluons via strong interaction which is described by quantum chromodynamics (QCD). Nucleons are members of a large family of baryons. Non-perturbative features of QCD, confinement and dynamical chiral symmetry broken, are the key to understand baryon p ... More
Presented by Prof. Sixue QIN on 18 Aug 2019 at 2:45 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The LHCb experiment has been continually producing interesting results of heavy baryon spectroscopy, owing to the large data sample of heavy flavor hadrons provided by the LHC and the excellent performance of the delicately designed detector. This talk will present the latest results of conventional heavy baryons from the LHCb experiment, including discoveries of new states and measurements of the ... More
Presented by Mr. Ao XU on 20 Aug 2019 at 4:15 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We study baryon-baryon scattering by applying time-ordered perturbation theory to the manifestly Lorentz-invariant formulation of chiral perturbation theory. The diagrammatic rules, for the first time, are worked out for the momentum-dependent interactions and propagators of particles with non-zero spin. We define the effective potential as a sum of two-baryon irreducible contributions of time-ord ... More
Presented by Dr. Xiu-Lei REN on 20 Aug 2019 at 8:55 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Field theories quantized on the lightfront have long been considered as a viable framework for hadron structure. In this talk I will give an overview of Basis Lightfront Quantization (BLFQ), a nonperturbative approach to hadron structure and mass spectrum based on the Hamiltonian formalism of the lightfront dynamics and the modern developments in *ab initio* nuclear structure calculations. I will ... More
Presented by Xingbo ZHAO on 20 Aug 2019 at 4:15 PM
Type: Leading parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
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 design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ 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 m ... More
Presented by Dr. Longke LI on 20 Aug 2019 at 10:45 AM
Type: Poster Track: Posters
The charmonium-like hybrid mesons with $J^{PC}=(0,1,2)^{-+}$ and $1^{--}$ are investigated on anisotropic lattices in the quenched approximation. For these states, we construct spatially extended operators by splitting the $\bar{c}\Gamma c B$-type operators into two parts ($c\bar{c}$ and the chromo-magnetic field strength $B$) with different spatial distances $r$. In the Coulomb gauge, the matrix ... More
Presented by Mr. Yunheng MA
Type: Poster Track: Posters
Using the local hidden gauge approach, we study the possibility of the existence of bottomed strange molecular states with isospin 0. We find three bound states with spin-parity 0+, 1+ and 2+ generated by the K*B* and Omega Bs* interaction, among which the state with spin 2 can be identified as B*s2(5840). In addition, we also study the K*B and Omega Bs interaction and find a bound state which can ... More
Presented by Mr. Zhi-Feng SUN
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Charmless b decays are CKM suppressed in the Standard Model and the tree amplitudes are comparable with corresponding loop amplitudes. Hence, new particles not foreseen in the SM that appear in the loops may alter observables of these decays. The violation of CP symmetry represents a promising opportunity to search for possible physic beyond the SM. In this talk, we present the most recent measur ... More
Presented by Prof. Wenbin QIAN on 17 Aug 2019 at 3:15 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Although from the gravitational point of view, the metric and the dilaton field define the background, in AdS/QCD models medium effects usually are catched only in metric. Here we discuss two examples where dilatons depending on temperature and/or density can be useful to study hadron properties at finite temperature and / or in a dense medium with AdS / QCD models.
Presented by Dr. Alfredo VEGA on 20 Aug 2019 at 5:20 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The existence of monopoles has been theoretically predicted since P. A. M. Dirac introduced the magnetic monopole in quantum mechanics. Moreover, a large number of experiments to observe monopoles have been conducted. Recently, in the field of condensed matter physics, a research group has reported that they created magnetic monopoles in the Bose-Einstein condensate and observed it in the laborat ... More
Presented by Dr. Masayasu HASEGAWA on 20 Aug 2019 at 5:00 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Central exclusive production at hadron colliders is characterised by the hadronic state produced at or close to midrapidity, and by the two forward scattered protons, or remnants thereof. No particles are produced between the midrapidity system and the forward going beam particles, and such events can hence be identified experimentally by a double gap topology. At LHC energies, central exclu ... More
Presented by Mr. Rainer SCHICKER on 20 Aug 2019 at 3:05 PM
on 21 Aug 2019 at 5:50 PM
Type: Leading parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
Physical models can suffer from systematic deficiencies due to omitted physics, which can bias parameter estimates and predictions. Such simplifications may be unavoidable, but physicists often have some idea of what is missing from their models. I discuss how physical knowledge of model discrepancy can be encoded into the language of Bayesian statistics, and how the inclusion of this uncertainty ... More
Presented by Jordan MELENDEZ on 17 Aug 2019 at 4:45 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Mass modifications of light scalar, pseudo-scalar, vector, and axial-vector mesons in nuclear matter are studied comprehensively. The mesons are described by the extended Linear Sigma Model which can reproduce vacuum properties such as masses and decay widths, and the nuclear matter is constructed by the two-flavor Parity Doublet Model which can fit the saturation density, binding energy, and inco ... More
Presented by Dr. Daiki SUENAGA on 18 Aug 2019 at 4:40 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The asymptotic freedom in QCD allows for accurate calculations at high energy using perturbation theory. At low energies, typical of hadronic systems, a perturbative approach using the coupling constant as the expansion parameter is not appropriate. Baryon spectroscopy has been essential for our understanding of QCD in the low-energy, strong-coupling regime. In this context, the quark model which ... More
Presented by Cintia WILLEMYNS on 17 Aug 2019 at 3:55 PM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
We investigate the Schmid theorem, which states that if one has a tree level mechanism with a particle decaying to two particles and one of them decaying posteriorly to two other particles, the possible triangle singularity developed by the mechanism of elastic rescattering of two of the three decay particles does not change the cross section provided by the tree level. We investigate the process ... More
Presented by Prof. Eulogio OSET on 20 Aug 2019 at 8:55 AM
Type: Plenary Session: Plenary session
Track: Plenary
Low-energy tests of fundamental symmetries are extremely sensitive probes of physics beyond the Standard Model (SM), reaching scales that are comparable, if not higher, than directly accessible at the energy frontier. The interpretation of low-energy precision experiments and their connection with models of BSM physics relies on controlling the theoretical uncertainties induced by the nonpertu ... More
Presented by Dr. Emanuele MEREGHETTI on 21 Aug 2019 at 4:40 PM
Type: Plenary Session: Plenary session
Track: Plenary
Heavy meson spectroscopy was very well described in terms of $Q\bar Q$ states since the discovery of the $J/\psi$ in 1974 up to the discovery of the $X(3872)$ in 2003. However the intriguing properties of this meson made evident that higher Fock components were necessary to describe heavy hadron spectroscopy for excited states. The inclusion of two hadron components induce coupled-channel effects ... More
Presented by David RODRIGUEZ ENTEM on 17 Aug 2019 at 12:15 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The LHCb experiment has measured CP violation (CPV) across the Dalitz plot of charmless decays of B mesons to 3 charged tracks, namely in Kππ, KKK, πππ, and πKK final states, with strikingly large CPV and strong variations with Dalitz variables. If one identifies these processes with b → sqq(bar), sss(bar) and b → dqq(bar), dss(bar), where q = u, d, then the “sum rule” that requires ... More
Presented by Prof. George W.S. HOU on 17 Aug 2019 at 3:55 PM
Type: Poster Track: Posters
In 2010, $\Lambda^*_{c\bar{c}}$ states were predicted as the strange number $S=-1$ partners of $N^*_{c\bar{c}}$, which are well known now as the $P_c$ states and observed experimentally by LHCb Collaboration. We analyze the decay behaviors of $\Lambda_{c\bar{c}}$ as S-wave hadronic molecules within the effective Lagrangian framework by a similar method, which has been applied on $P_c$ states succ ... More
Presented by Dr. Jia-Jun WU
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
A detailed study is presented of the flavor-exotic isoscalar $T_{bb}^-\equiv b b \bar u \bar d$ tetraquark. with spin and parity $J^P=1^+$. In realistic quark models, with a careful treatment of the 4-body problem, the $T_{bb}^-$ is approximately $150\,$MeV below the strong decay threshold $B^-\bar {B^*}^{0}$ and $105\,$MeV below the electromagnetic decay threshold $B^- \bar B^0 \gamma$. ... More
Presented by Prof. Jean-Marc RICHARD on 20 Aug 2019 at 4:40 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
In this talk, I would like to report our recent study on decay properties of a few heavy favor baryons, including the excited bottom baryons, $\Sigma_{b}(6097)^{\pm}$, $\Xi_{b}(6227)^-$ and the doubly charmed baryons $\Xi_{cc}^{*++}$. We utilize the method of light-cone sum rules, which is widely used to study the hadron decays in recent years. Our estimations suggest that the bottom baryons $\Sig ... More
Presented by Er-Liang CUI on 20 Aug 2019 at 5:00 PM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Based on the hypothesis that the $X(3872)$ exotic hadron is a mixture of $\chi_{c1}(2P)$ and other states and that its prompt hadroproduction predominately proceeds via its $\chi_{c1}(2P)$ component, we calculate the prompt-X(3872) polarization at the CERN LHC through next-to-leading order in $\alpha_s$ within the factorization formalism of nonrelativistic QCD, including both the color-singlet $^3 ... More
Presented by Zhiguo HE on 17 Aug 2019 at 4:45 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The updated analysis of LHCb in the $\Lambda_b^0\to J/\psi p K^-$ process with nine times data sample in Run II presents three narrow pentaquark structures instead of two in the previous analysis. However, although the large data sample is available, the quantum numbers of the three pentaquarks and the corresponding anglular momentum distribution are still missing. As these three pentaq ... More
Presented by Dr. Meng-Lin DU on 18 Aug 2019 at 4:40 PM
Type: Leading parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
I will summarize our recent works on the study of nuclear matter based on a chiral model with parity doublet structure. In our model, we construct a chiral model including four light nucleons, N(939), N(1440), N(1535) and N(1650) based on the parity doublet structure. We first determine the model parameters by fitting them to available experimental values of masses, widths and the axial charge ... More
Presented by Prof. Masayasu HARADA on 18 Aug 2019 at 4:15 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In 2017, the BESIII Collaboration announced the observation of charged charmonium-like structure in the $\psi(3686)\pi^\pm$ invariant mass spectrum of the $e^+ e^- \to \psi(3686) \pi^+ \pi^-$ process at different energy points, which makes a precise study of the $e^+ e^- \to \psi(3686) \pi^+ \pi^-$ process based on the initial single pion emission (ISPE) mechanism become possible. In my report, I ... More
Presented by Dr. Qi HUANG on 21 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
In this talk, I will review our recent developments on the study of using lattice discrete energy levels to determine the resonance properties within the framework of chiral effective field theory. Special attention will be paid to the D*0(2400) in the D-pi, D-eta and Ds-Kbar coupled-channel scattering and the Ds*0(2317) in the DK and Ds-eta scattering.
Presented by Prof. Zhi-Hui GUO on 20 Aug 2019 at 2:25 PM
Type: Poster Track: Posters
Within the chiral unitary approach, the axial-vector resonance $K_1(1270)$ has been predicted to manifest a two-pole nature. The lowest pole has a mass of 1195 Mev and a width of 246 Mev and couples mostly to $K^*\pi$, and the highest pole has a mass of 1284 Mev and a width of 146 Mev and couples mostly to $\rho K$. We analyze theoretically how this double-pole structure can show up in the $D^0\t ... More
Presented by Mrs. Guanying WANG
Type: Leading parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
In my talk, I will present our recent dispersive analysis of the gamma* gamma* -> pipi/ pieta processes from the threshold up to 1.4 GeV in the two-photon invariant mass. These amplitudes serve as an important input to constrain the hadronic piece of light-by-light scattering contribution to (g-2) and support the current experimental program at BESIII.
Presented by Igor DANILKIN on 20 Aug 2019 at 10:45 AM
Type: Plenary Session: Plenary session
Track: Plenary
This is a review of dynamically generated hadronic resonances
Presented by Prof. Tetsuo HYODO on 18 Aug 2019 at 11:20 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
An Electron Ion Collider (EIC) proposed in the U.S. has received wide support from Nuclear Science Advisory Committee and National Academy of Sciences. With flexible collision energies, high luminosity, and high polarization, EIC will enable us to perform quantum tomography of nucleons and nuclei, and explore a new form of matter - color glass condensate. In this talk, I will highlight these two m ... More
Presented by Zhongbo KANG on 20 Aug 2019 at 2:25 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Light Front (LF) QCD Hamiltonian in LF gauge is used semiphenomenologically to describe quark-antiquark bound states. Quarks and gluons are considered as constituent particles and the Hamiltonian is projected onto the Fock space of these constituent particles. Quark and antiquark in these states are separated in transverse coordinates in gauge invariant way by the "string" constracted with zero mo ... More
Presented by Dr. Mikhail MALYSHEV on 20 Aug 2019 at 4:40 PM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
In this work we study the effects of a triangle singularity in the cross sections of the πp → K⁰πΣ and pp → pK⁺πΣ reactions. The triangle mechanism is generated the following way: the initial scattering creates the N* resonance that decays into K*Σ, then, the K* decays into πK and the π fuses with Σ to create the Λ(1405). From this mechanism, a peak associated with the triangle s ... More
Presented by Rafael PAVAO on 20 Aug 2019 at 11:30 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The mass of tetraquark states of all $q^2\bar q^2$ and $q\bar q c\bar c$ quark configurations is evaluated in a constituent quark model, where the Cornell potential is employed and all model parameters are predetermined by comparing the theoretical and experimental masses of light, charmed and bottom mesons. The theoretical predictions of the charmed tetraquarks are compared with the observed $XY ... More
Presented by Zheng ZHAO on 20 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The GlueX detector in the experimental Hall D at Jefferson Lab was designed to search for gluonic excitations in the spectra of light mesons using photon beams. The detector provides a unique capability to perform a precision measurement of the eta -> gamma gamma decay width via the Primakoff effect (PrimEx D experiment) and study rare decays of eta mesons. Measurement of the eta decay ... More
Presented by Dr. Alexander SOMOV on 18 Aug 2019 at 5:00 PM
Type: Plenary Session: Plenary session
Track: Plenary
The task of mapping and explaining the spectrum of baryons and the structure of these states in terms of quarks and gluons is a longstanding challenge in hadron physics, which is likely to persist for another decade or more. We review the progress made in this topic using a functional method that combines Dyson-Schwinger equations with hadronic bound-state equations, namely Bethe-Salpeter and Fadd ... More
Presented by Jorge SEGOVIA on 18 Aug 2019 at 10:45 AM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
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 design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has completed a ... More
Presented by Mr. Sen JIA on 21 Aug 2019 at 10:45 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
I review recent results on exotic hadrons such as glueballs and tetraquarks obtained in the framework of functional Dyson-Schwinger and Bethe-Salpeter equations. First results for quenched glueballs in this framework have been published in 2012; I present an update of these results and discuss preliminary results in the unquenched case. For tetraquarks, based on our earlier results on the ligh ... More
Presented by Christian FISCHER on 17 Aug 2019 at 5:10 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In this talk I shall review our QCD sum rule studies on exotic hadrons. In the past decade many charmonium-like states were observed experimentally, and various theoretical methods/models were applied to study them. The method of QCD sum rules is one of them, and has also been widely applied to study the mass spectra, production and decay properties of exotic hadrons.
Presented by Dr. Hua-Xing CHEN on 17 Aug 2019 at 5:30 PM
Type: Plenary Session: Plenary session
Track: Plenary
The recent experimental results on the doubly-charmed baryons and pentaquark candidates will be reviewed.
Presented by Liming ZHANG on 17 Aug 2019 at 8:50 AM
Type: Plenary Session: Plenary session
Track: Plenary
This is an experimental review of the spectroscopy of singly-heavy mesons and baryons.
Presented by John YELTON on 17 Aug 2019 at 9:25 AM
Type: Plenary Session: Plenary session
Track: Plenary
Starting from the last decade of this century, many charmonium-like (also called as XYZ) states have been discovered at different experiments, including the two B-factories, BESIII,CDF, CMS, D0 and LHCb. These states are located at the charmonium region, but carry properties that can not be explained as conventional hadrons. They are considered as good candidates of exotic hadronic states which ar ... More
Presented by Yuping GUO on 17 Aug 2019 at 10:00 AM
Type: Leading parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Double Λ hypernuclei and Ξ hypernuclei, collectively called “double hypernuclei”, have come to play important roles in hadron nuclear physics as valuable information sources of baryon-baryon interaction. The most effective method to investigate them is event-by-event analysis with photographic emulsion sheets. An emulsion experiment to detect double hypernuclei has been performed in the J-PA ... More
Presented by Dr. Junya YOSHIDA on 21 Aug 2019 at 10:45 AM
Type: Leading parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The production of heavy quarkonium in heavy ion collisions has been used as an important probe of the quark-gluon plasma. The initial insight was that due to the plasma screening effect, the color attraction between the heavy quark pair is significantly suppressed at high temperature and thus no bound states can exist, i.e., they “melt”. However, experimental measurements have shown that a lar ... More
Presented by Mr. Xiaojun YAO on 21 Aug 2019 at 8:30 AM
Type: Plenary Session: Plenary session
Track: Plenary
Three-body decays of heavy-flavoured hadrons into light particles are sequential processes, dominated by intermediate resonant states that requires a full amplitude analysis to be determined. These decays are a natural source of information about two-body scattering amplitudes, as an alternative to the early scattering data. However, the determination of the two-body amplitudes requires the ... More
Presented by Dr. Patricia MAGALHAES on 17 Aug 2019 at 11:40 AM
Type: Poster Track: Posters
Based on $(4.48 \pm 0.03)\times10^{8}$ $\psi^{\prime}$ events, collected with the BESIII detector at the BEPCII storage ring, five $h_c$ hadronic decays are searched for via the process $\psi^{\prime} \to \pi^{0} h_c$. Three of them, $h_c \to p \bar{p} \pi^{+} \pi^{-}$, $\pi^{+} \pi^{-} \pi^{0}$, and $2(\pi^{+} \pi^{-}) \pi^{0}$, are observed for the first time with significances of 7.4$\sigma$, $ ... More
Presented by Mr. lianjin WU
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
X(3872) and Y(4260) are famous for their exotic nature. We present search for $B \to Y(4260) K$, $B \to X(3872) (\to \chi_{c1}\pi^0) K$ and $B \to X(3915)(\to \chi_{c1} \pi^0) K$ at Belle based on the full data sample accumulated by the Belle experiment at KEKB asymmetric energy $e^+ e^-$ collider. As no signal is found, upper limit on the product branching fraction is provided. We also repo ... More
Presented by Ms. Renu GARG on 20 Aug 2019 at 2:45 PM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Photoproduction of charmonium near threshold gives an excellent probe for studying the gluonic structure of the nucleon. Of more recent interest is the possibility of producing the $P_c^+$ pentaquark candidates reported by LHCb in the s-channel reaction: $\gamma p -> P_c^+ \to p J/\psi$. We report on the measurement of the total cross section $\sigma(\gamma p \to p J/\psi)$ in 10 bins of p ... More
Presented by Sean DOBBS on 18 Aug 2019 at 4:15 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The recent experiments by LHCb indicates that the $NJ/\psi$-$\Lambda_c \bar D$-$\Sigma_c \bar D$ or $q^3c\bar c$ systems have a rich spectrum [1]. Theoretically also, it has been found that a quark cluster model, or a hadron model which includes the five-quark mode, gives narrow resonances or cusps in the $Y_c \bar D$ scattering [2,3]. Such a structure appears because the three light quarks in t ... More
Presented by Dr. Sachiko TAKEUCHI on 21 Aug 2019 at 11:10 AM
Type: Leading parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
Modern hadron-spectroscopy experiments such as COMPASS collect data samples of unprecedented size, so that novel analysis techniques become possible and necessary. One such technique is the freed-isobar partial-wave analysis (PWA). In this approach, fixed parametrizations for the amplitudes of intermediate states–commonly modeled using Breit-Wigner shapes–are replaced by sets of step-like ... More
Presented by Fabian KRINNER on 17 Aug 2019 at 2:30 PM
Type: Leading parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Encapsulating the transverse position of partons as functions of their longitudinal momentum, Generalized Parton Distributions (GPDs) go beyond the 1-dimensional description of the partonic structure of the nucleon and provides a 3-dimensional picture of the nucleon. GPDs have drawn considerable theoretical interest and been studied by experimental efforts through processes such as Deeply Virtual ... More
Presented by Po-Ju LIN on 20 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We calculate the generalized and transverse momentum dependent parton distribution function with chiral effective theory. The results are comparable with experimental results.
Presented by Fangcheng HE on 20 Aug 2019 at 11:10 AM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
We study the effects of the $\Delta$(1232) resonance as an effective degree of freedom in a global analysis of the pion photo-production off nucleons. Cross sections and polarization observables have been calculated for charged and neutral pion channels in relativistic chiral perturbation theory up to third order in the δ counting. We compare our model with a large database containing the avail ... More
Presented by Gustavo H. GUERRERO NAVARRO on 17 Aug 2019 at 3:15 PM
Type: Plenary Session: Plenary session
Track: Plenary
This is a review on recent progress in lattice QCD calculations of hadron spectroscopy.
Presented by Jozef DUDEK on 21 Aug 2019 at 2:35 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
A time-projection chamber, HypTPC has been developed at J-PARC for hadron spectroscopy experiments. HypTPC has a large acceptance thanks to the internal target system and a high-rate capability up to 1 MHz or even higher. So far, three experiments are planned with HypTPC, namely, H-dibaryon search experiment (E42), baryon spectroscopy experiment with (pi,pipi) reactions (E45), and a new exo ... More
Presented by Dr. Kiyoshi TANIDA on 21 Aug 2019 at 10:45 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1, 3.19 fb-1 and 0.567 fb-1 at center-of-mass energies of 3.773, 4.178, and 4.6 GeV, respectively. The data set collected at 3.773 GeV contains quantum-correlated D0D0bar pairs that allow to access the phase differences between amplitudes. We report the measurements of strong phase differences in D0(-bar) decays, especial ... More
Presented by Dr. Pei-Rong LI on 17 Aug 2019 at 2:55 PM
Type: Parallel Session: Session 1: Meson spectroscopy
We report a robust prediction of heavy $K^\ast$ meson, which can be viewed as the excited Kaon state with hidden charm, through a study of the three-body system $KD\bar{D}^\ast$ using the fixed-center approximation to the Feddeev equations [1]. The two-body interactions are stringently constrained by the experimental as well as theoretical investigations. Concrete coupled channel three-body calcul ... More
Presented by Dr. Xiu-Lei REN on 21 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The LHCb Collaboration has discovered five excited $\Omega_c$ states with masses between 3 and 3.1 GeV [1], four of them recently corroborated by the Belle Collaboration [2]. Moreover, the LHCb Collaboration has recently reported one $\Xi_b(6227)$ state [3], whereas several $\Xi_c$ states are described in the PDG. Indeed, one $\Xi_c$ at 2930 MeV was first reported by the BaBar Collaboration [4] an ... More
Presented by Laura TOLOS on 20 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
I will represent selected results on hadron production in heavy-ion collisions at RHIC-STAR. I will focus on the hyper nuclear data and also discuss a little bit of the future plan.
Presented by Dr. Jinhui CHEN on 21 Aug 2019 at 11:10 AM
Type: Poster Track: Posters
In this talk we discuss the holographic approximation to the calculation of mesonic decay constants in the context of the bottom-up AdS/QCD models such as the soft wall-like approaches. We show some of the technical difficulties and some possible solutions to them.
Presented by Miguel Angel MARTIN-CONTRERAS
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
In this talk we present our latest study on pseudoscalar-baryon and vector baryon coupled channel interactions. The formalism consists of calculations of s-, t, and u-channel diagrams for all channels and use the sum of such diagrams as kernels to solve Bethe Salpeter equation. The vertices, to calculate the lowest order amplitudes, are taken from chiral and hidden local symmetry Lagrangians. The ... More
Presented by Kanchan KHEMCHANDANI on 18 Aug 2019 at 3:05 PM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
A resonance-like structure as narrow as 10 MeV is observed in the $K^-p$ invariant mass distributions in $\Lambda_c^+\to p K^- \pi^+$. This precise measurement is based on a data sample of about 1.5 million events, and the bin width of $K^-p$ invariant mass is only 1 MeV. The narrow peak precisely lies on the $\Lambda\eta$ threshold, because of which it is natural to identify it as a threshold cus ... More
Presented by Xiao-Hai LIU on 20 Aug 2019 at 11:10 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
Neutral current single pion production induced by neutrinos and antineutrinos on nucleon targets has been investigated in manifestly relativistic baryon chiral perturbation theory with explicit $\Delta(1232)$ degrees of freedom up to $\mathcal{O}(p^3)$. At low energies, where chiral perturbation theory is applicable, the total cross sections for the different reaction channels exhibit a sizable no ... More
Presented by Dr. De-Liang YAO on 21 Aug 2019 at 11:51 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In the last decade, numerous states have been observed which contain a heavy quark-antiquark pair, but demonstrate properties at odds with a simple quarkonium assignement. Such states are conventionally denoted as exotic states and traditionally labelled by the letters X, Y and Z. Due to the presence of the heavy quraks, properties of various exotic states can be related through the Heavy Quark S ... More
Presented by Prof. Qian WANG on 17 Aug 2019 at 3:15 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The precision measurement of two solar mass neutron stars (NS) and recent observation of the neutron star merger give stringent constraints to the equation of states (EOS) of models describing such dense objects. While the allowed phase space is reduced by all these experimental observations, the hyperon puzzle, that question the presence of hyperons within NS, is still unresolved. For all ... More
Presented by Steffen MAURUS on 18 Aug 2019 at 3:25 PM
Type: Poster Track: Session 4: Hadron decays, production and interactions
By means of the effective theory used to take into account final state interaction in weak decays with two hadrons in the final state, which sometimes leads to resonant states, we take into account the loop corrections connecting the B and D mesons via pseudoscalar or vector exchange, having intermediate (B,D), (Bs,Ds), (B*,D*) or (B*s,D*s) states. We find corrections that modify the strength of t ... More
Presented by Dr. Natsumi IKENO
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We have studied the interactions between two heavy mesons [D-D or B-B] within heavy meson chiral effective field theory and investigated possible molecular states. The effective potentials are calculated with Weinberg's scheme up to one-loop level. At the leading order, four body contact interactions and one pion exchange contributions are considered. In addition to two pion exchange diagrams, we ... More
Presented by Dr. Zhan-Wei LIU on 20 Aug 2019 at 3:05 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
QCD Gaussian sum-rules are used to explore the vector ($J^{PC}=1^{--}$) strangeonium hybrid interpretation of the Y(2175). Using a two-resonance model consisting of the Y(2175) and an additional resonance, we find that the relative resonance strength of the Y(2175) in the Gaussian sum-rules is less than 5\% that of a heavier $2.9$ GeV state. This small relative strength presents a challenge to a ... More
Presented by Wei CHEN on 20 Aug 2019 at 9:55 AM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The quark model, proposed in the 1960s, predicts exotic hadrons beyond the conventional quark-antiquark mesons and three quark baryons. However, it was less than 15 years ago that exotic candidates were observed. Since then a number of exotic states have been discovered. LHCb has reported on tetraquark candidates such as the X(3872) as well as the discovery of pentaquark resonances in 2015. Many t ... More
Presented by Nicola Anne SKIDMORE on 20 Aug 2019 at 2:00 PM
Type: Plenary Session: Plenary session
Track: Plenary
After briefly reviewing methodologies to investigate baryon-baryon interactions in lattice QCD, I will present our results on dibaryons using the HAL QCD potential method, which are obtains at almost physical as well as heavier pion masses. In this talk, I will focus on Omega-Omega, N-Omega, Delta-Delta and H-dibaryons.
Presented by Sinya AOKI on 21 Aug 2019 at 3:10 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Studies of light hadron and nuclei production are fundamental to characterise the hot and dense fireball created in ultra-relativistic heavy ion collisions and to investigate hadronisation mechanisms at the LHC. Studies performed as a function of the charged particle multiplicity in proton-proton and proton-lead collisions have shown features not expected and qualitatively similar to what is obser ... More
Presented by Domenico COLELLA on 18 Aug 2019 at 2:45 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Since the high production rate of light mesons in J/psi decays, the sample of 1.3 billion Jpsi events accumulated at BESIII offer a unique laboratory for investigating light meson decays. Recently many progresses on light meson decays, e.g., eta/etaprime/omega, were achieved at BESIII, including the observation of eta’-> rho+ pi-, precision study of eta’->gamma pi pi decay dynamics and the obs ... More
Presented by Yuming MA on 18 Aug 2019 at 4:40 PM
Type: Plenary Session: Plenary session
Track: Plenary
The study of light hadrons is central to the understanding of confinement--a unique property of QCD. The quark model describs mesons as bound states of quarks and antiquarks. LQCD and QCD-motivated models for hadrons, however, predict a richer spectrum of mesons that takes into account not only the quark degrees of freedom but also the gluonic degrees of freedom. Recent progress in the light-q ... More
Presented by Prof. Beijiang LIU on 18 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
Recent lattice data on smaller strange quark mass than the physical one allow us to study the strangeness dependence of connected observables as pseudoscalar decay constants and ($I=J=1$) -$\pi\pi$ -phase shifts for the first time. Moreover, we perform a global analysis on TrM $=c$ and $m_s=c$ trajectories, which guide new predictions on trajectories like $m_u=c$. Unitarized one-loop Chiral Pertur ... More
Presented by Dr. R. MOLINA on 18 Aug 2019 at 3:05 PM
Type: Plenary Session: Plenary session
Track: Plenary
The excitation spectrum of light mesons, which are composed of up, down, and strange quarks, is studied since decades. However, it still holds a number of puzzles and surprises that provide new insights into the nature of the strong interaction. Recent high-quality data samples from several experiments allow us to not only study the properties of established mesons with unprecedented precision ... More
Presented by Boris GRUBE on 18 Aug 2019 at 9:05 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We have performed a calculation of the DD¯, DD¯*, D*D¯, D*D¯* components in the wave function of the ψ(3770). For this we make use of the P03 model to find the coupling of ψ(3770) to these components, that with an elaborate angular momentum algebra can be obtained with only one parameter. Then we use data for the e+e-→DD¯ reaction, from where we determine a form factor needed in the theor ... More
Presented by Mr. Qixin YU on 20 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We give a parameterizztion of the anomalous line shape of resonances based on a Fano-type formula, which can be widely used to extract properties of resonances from data. We employ it to explain the anomalous line shape of the $e^+ e^- \to D \bar{D}$ and $e^+ e^- \to \Lambda \bar{\Lambda}$. In both reactions, a below-threshold state is found to play significant role in the measured cross sections.
Presented by Xu CAO on 20 Aug 2019 at 11:50 AM
Type: Leading parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The KLOE-2 experiment completed its data-taking at the e+e- DAPHNE collider in Frascati, achieving the integrated luminosity goal of more than 5 fb-1 at the phi peak. KLOE-2 represents the continuation of KLOE with an upgraded detector and an extended physics program, which includes the study of light meson properties and decay dynamics with unprecedented statistics. The new data sample, toge ... More
Presented by Dr. Xiaolin KANG on 21 Aug 2019 at 10:45 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
We study the light quark-mass dependence of charmed baryon masses as measured by various QCD lattice collaborations. A global fit to such data based on the chiral SU(3) Lagrangian is reported on. All low-energy constants that are relevant at next-to-next-to-next-to-leading order (N$^3$LO) are determined from the lattice data sets where constraints from sum rules as they follow from large-$N_c$ QCD ... More
Presented by Dr. Yonggoo HEO on 20 Aug 2019 at 4:40 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The properties of nucleons and $\Delta$ isobars in a uniform magnetic field are investigated. In the weak magnetic field region, the general relations between magnetic moment of nucleons and $\Delta$ isobars are given. The estimation shows in the core part of the magnetar, the equation of state fornucleons and $\Delta$ isobars depends on the magnetic field, which affects the mass limit of the ma ... More
Presented by bingran HE on 20 Aug 2019 at 4:40 PM
Type: Leading parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Higgs boson provides the origin of quark masses. But how it is related to the proton mass and thus the masses of nuclei and atoms is another question. I will present the state-of-the-art understading of the proton mass based on the Lattice QCD calculation of QCD energy momentum tensor, and a outlook on how to access the trace anomaly in the near future.
Presented by Yi-Bo YANG on 17 Aug 2019 at 4:45 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The production of $W^\pm$ bosons in longitudinally polarized proton-proton collisions at RHIC provides a direct probe for the spin-flavor structure of the proton through the parity-violating single-spin asymmetry, $A_L$. At STAR, the leptonic decay channel $W \to e\nu$ can be effectively measured with the electromagnetic calorimeters and time projection chamber. STAR has measured the $A_L(W)$ as a ... More
Presented by Jinlong ZHANG on 18 Aug 2019 at 4:40 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The branching fractions of ground state charmed baryon are not measured so far except for the $\Lambda_c$. Only the branching fractions relative to the primary decay modes are measured. The measurement is important to test our understanding of weak decay of baryons and measurement of absolute production cross sections. We report first measurement of the absolute branching fraction of $\Xi_c^0$ ... More
Presented by Mr. Yubo LI on 21 Aug 2019 at 11:30 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Decays of the Bs meson via b ->c cbar s transitions such as Bs0 -> J/psi K K and Bs0 -> J/psi pi pi are sensitive to the CP-violating phase phi_s, which is known with a good precision from global fits based on the Standard Model. Physics beyond the Standard model can affect the Bs0-Bs0bar oscillations or contribute to second-order processes, introducing a sizable shift in phi_s and providing evide ... More
Presented by Ms. Xuesong LIU on 17 Aug 2019 at 3:35 PM
Type: Plenary Session: Plenary session
Track: Plenary
The low-energy e+e- colliders provide important information on hadronic cross sections from e+e- annihilation. Besides rich dynamics involved in hadron production itself, such measurements also give an input to the calculation of various fundamental quantities like muon g-2, running alpha and others from various QCD applications. A review of recent results from the Novosibirsk e+e- experiments ... More
Presented by Dr. Fedor IGNATOV on 21 Aug 2019 at 4:05 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We solve the Minkowski-space Schwinger-Dyson equation for the fermion propagator in QED with massive photons. Specifically, we work in the quenched approximation within the rainbow-ladder truncation. Loop divergences are regularized either by the Pauli-Villars regularization or by the dimensional regularization. With moderately strong fermion-photon coupling, we find that the analytic structure of ... More
Presented by Shaoyang JIA on 17 Aug 2019 at 5:30 PM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
We have investigated Ωc states that are dynamically generated from the meson-baryon interaction. We use an extension of the local hidden gauge to obtain the interaction from the exchange of vector mesons. We show that the dominant terms come from the exchange of light vectors, where the heavy quarks are spectators. This has as a consequence that heavy quark symmetry is preserved for the domina ... More
Presented by Prof. Eulogio OSET on 21 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In a recent work we have studied  three-body scattering, considering the $DDK$ system, in a coupled channel approach. All input two-body scattering matrices have been obtained by solving Bethe-Salpeter equations for different channels coupling to same quantum numbers. The lowest order amplitudes for the two-body subsystems are obtained from a Lagrangian based on the heavy quark symmetry. We hav ... More
Presented by Dr. Alberto MARTINEZ TORRES on 21 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In this work, we try to gain insights into the structure of the $Y(4260)$ from the light-quark perspective. We study the dipion invariant mass spectrum of the $e^+ e^- \to Y(4260) \to J/\psi \pi^+\pi^-$ process and the ratio of the cross sections ${\sigma(e^+e^- \to J/\psi K^+ K^-)}/{\sigma(e^+e^- \to J/\psi \pi^+\pi^-)}$. In particular, we consider the effects of different light-quark SU(3) ... More
Presented by Yun-Hua CHEN on 20 Aug 2019 at 3:05 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
As the lightest and the simplest hadronic particle, the neutral pion plays a crucial role in understanding the symmetries of QCD at low-energy. The π0→γγ decay width offers a fundamental test of the QCD predictions based on the chiral anomaly and spontaneous chiral symmetry breaking. The theoretical calculations over the past two decades have reached 1% precision in the decay amplitude of the ... More
Presented by Prof. Liping GAN on 18 Aug 2019 at 5:20 PM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
X(3872) has been observed for more than 15 years ago, but its nature is still unclear. It is considered as an unconventional charmonium candidate. BESIII has collected about 12 fb^{-1} data at center of mass energies from 4.15 to 4.60 GeV. Using these data samples, the decay of X(3872) has been studied extensively, including pi0 chi_cJ, omega J/psi, pi pi J/psi, and gamma psi(1,2S). New results fr ... More
Presented by Dr. Kai ZHU on 17 Aug 2019 at 2:30 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The vector charmoniumlike (such as Y(4260), Y(4360), and Y(4660)) states are observed in exclusive processes in electron-positron collider, but not appear in the total hadronic cross section. Understanding of these vector charmoniumlike states is a challenge. BESIII has collected more than 13 fb^{-1} data samples at center of mass energies from 3.8 to 4.6 GeV, including 13 energy points with lum ... More
Presented by Mr. Jielei ZHANG on 20 Aug 2019 at 2:25 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The discovery of $\Xi_{cc}^{++}$ by the LHCb Collaboration triggers predictions of more doubly charmed baryons. By taking into account both the $P$-wave excitations between the two charm quarks and the scattering of light pseudoscalar mesons off the ground state doubly charmed baryons, a set of negative-parity spin-1/2 doubly charmed baryons are predicted already from a unitarized version of le ... More
Presented by Dr. Maojun YAN on 20 Aug 2019 at 2:25 PM
Type: Leading parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The newly completed JLab experiment E12-17-003 aimed to search for a possible Λnn resonance using the 3H(e, e’K+)(Λnn) reaction. If such a state does exist, the experiment will measure its binding (or excitation) energy and natural width. These measurements will provide extremely important and experimentally determined information, for the first time, that can be used to investigate the unknow ... More
Presented by Prof. Liguang TANG on 20 Aug 2019 at 4:15 PM
Type: Plenary Session: Plenary session
Track: Plenary
This is a review of the recent progress in understanding the nucleon structure, including both the theoretical and lattice developments.
Presented by Prof. Xiangdong JI on 19 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
psi(2S) provides good opportunities for the study of chi_cJ, eta_c, and h_c decays. These studies can be used to verify QCD based models, which provide predictions for the decay mechanism. With the world's largest sample of 4.48*10^8, progress on the charmonium decays has been made. In the talk, we report the new results, such as the first measurement of the branching ratioof chi_c1,2 to mu+ mu-; ... More
Presented by Dr. Guangrui LIAO on 18 Aug 2019 at 2:45 PM
Type: Leading parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The spectrum of hyperon with S=-2,-3 are still not well known. The large data sample accumulated by the Belle experiment at KEKB asymmetric energy $e^+ e^-$ collider provide a unique opportunity to study these hyperons. In this presentation, we report observation and evidence of $\Xi(1620)$ and $\Xi(1690)$ in the $\Xi_c \to \Xi\pi\pi$ decay, and observation of new excited Omega- baryon decayin ... More
Presented by Dr. Chengping SHEN on 18 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
By describing the $X(3872)$ using the extended Friedrichs scheme, in which $D\bar D^*$ is the dominant component, we calculate the decay rates of the $X(3872)$ to $\pi^0$ and a $P$-wave charmonium $\chi_{cJ}$ state with $J=0,1$, or $2$, and its decays to $J/\psi\pi^+\pi^-$ where $\pi^+\pi^-$ are assumed to be produced via an intermediate $\rho$ state. The decay widths of $X(3872)\to\chi_{cJ} ... More
Presented by Dr. Zhi-Yong ZHOU on 17 Aug 2019 at 3:55 PM
Type: Poster Track: Posters
The interrelation between the deconfinement temperature of hadron medium and parameters of radial Regge trajectories within the bottom-up holographic models for QCD is scrutinized. We show that the lattice data on the deconfinement temperature can yield a powerful restriction on the spectrum of excited mesons and glueballs within the framework of holographic approach. The best phenomenological agr ... More
Presented by Sergei AFONIN
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We study the parton distribution functions of the pion and the kaon from the eigenstates of a light front effective Hamiltonian in the constituent quark-antiquark representation suitable for low-momentum scale applications. By taking these scales as the only free parameters, the valence quark distribution functions of the pion, after QCD evolution, are consistent with the experimental data from ... More
Presented by Mr. Jiangshan LAN on 18 Aug 2019 at 5:20 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We study the dependence of meson masses and decay constants on the up, down and strange quark masses [1,2,3]. The role of dynamical vector meson degrees of freedom is scrutinized in terms of an effective chiral Lagrangian based on the hadrogenesis conjecture. At the one-loop level, we derive the chiral corrections to the self-energies of the Goldstone bosons and vector mesons as well as the d ... More
Presented by Dr. Xiao-Yu GUO on 20 Aug 2019 at 2:45 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
We report on our recent study of systems composed solely of $\Lambda(1405)$ (denoted by $\Lambda^*$) baryons [1] in which we test a hypothesis of absolutely stable strange hadronic matter [2]. We employed a broad range of $\Lambda^* \Lambda^*$ interaction strengths compatible with binding energy of 2 $\Lambda^*$ system $B(2 \Lambda^*)=40$ MeV given by the phenomenological energy-independent $\bar{ ... More
Presented by Jaroslava HRTANKOVA on 18 Aug 2019 at 5:20 PM
Type: Leading parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
In this presentation, we briefly review the study of newly observed dibaryon resonance d*(2380) (IJP=03+), and in particular, the recent studies of this resonance based on a chiral constituent quark model. The model calculations for its mass and wave function exhibit that it may be assigned as a compact hexaquark system with a dominant hidden-color component. The good explanations for the strong d ... More
Presented by Dr. Yubing DONG on 21 Aug 2019 at 8:30 AM
Type: Leading parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We will provide the recent progress in TMD physics. In particular I will emphasize the recent TMD global analysis of both unpolarized and polarized TMD parton distribution functions in standard SIDIS, Drell-Yan, and e+e- channels. Then I will present the progress on how one can go beyond these processes to probe TMD physics in vector-boson tagged jet production. We finish the talk with the recent ... More
Presented by Zhongbo KANG on 20 Aug 2019 at 10:45 AM
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The GlueX experiment in Hall D at Jefferson Lab consists of a well-instrumented photon beamline in conjunction with a solenoidal spectrometer providing near-hermetic coverage for charged particles and photons. Since 2016, the experiment has had several run periods with a 9 GeV linearly polarized photon beam on a 30cm liquid hydrogen target, completing its initial low-intensity program. Light (i.e. ... More
Presented by David MACK on 18 Aug 2019 at 4:15 PM
Type: Leading parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The GlueX experiment, which is focused on studying the hadron spectrum using polarized photoproduction, completed its initial phase of data taking in the fall of 2018. These data will provide the opportunity to study production mechanisms of mesons as well as searches for new states in the hadron spectrum, including those with gluonic degrees of freedom. In addition, the GlueX collaboration has ... More
Presented by Prof. Matthew SHEPHERD on 18 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The decay K+→π+vv ̅, with a very precisely predicted branching ratio of less than 10-10, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at the CERN SPS is designed to measure the branching ratio of the K+→π+vv ̅ with a decay-in-flight technique. NA62 took data so far in 2016-2018. Statistics collected in 2016 allowed ... More
Presented by Mr. Michal ZAMKOVSKY on 17 Aug 2019 at 5:10 PM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
PAWIAN is a powerful, user-friendly and highly modular partial wave analysis software package with the aim to support analyses for a multitude of different physics cases at hadron physics experiments. Real data originating from the pbar p annihilation process and from e+ e- reactions are currently under investigation with PAWIAN. The software is written in C++ and follows an object-oriented approa ... More
Presented by Dr. Malte ALBRECHT on 17 Aug 2019 at 3:35 PM
Type: Leading parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
I review recent progress in the determination of the collinear parton distribution functions (PDFs) of the proton. I focus on how the needs for accuracy and precision in current and future programs at high-energy accelerators are addressed in contemporary PDF sets. I discuss the impact on PDFs of the uncertainties coming from the data, the theory and the methodology, and I outline some correspondi ... More
Presented by Emanuele Roberto NOCERA on 18 Aug 2019 at 4:15 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
In this talk, I will present the study on two photon transition form factors of neutral pseudoscalar mesons with a continuum approach. It delivers an understanding of the distribution of valence-quarks within mesons. A unified picture for transition form factors of mesons connecting pion, flavor mixing states and heavy quarkonia will be drawn.
Presented by Dr. Minghui DING on 17 Aug 2019 at 3:15 PM
Type: Plenary Session: Plenary session
Track: Plenary
This talk will discuss perspectives of hadron spectroscopy on future facilities
Presented by Simon EIDELMAN on 21 Aug 2019 at 5:15 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The study of resonance photoproduction is essential for both fundamental and practical reasons. On the one hand the structure of resonances is directly related to basic properties of QCD like the confinement. On the other hand reliable models are needed to describe the wealth of the resonance photoproduction data to be expected in near future from JLab, ELSA, MAMI, BESIII and SPring-8 experiments. ... More
Presented by Lukasz BIBRZYCKI on 18 Aug 2019 at 5:40 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Basis Light-front Quantization (BLFQ) is a newly developed nonperturbative approach, aiming for solving relativistic bound systems based on the Hamiltonian formalism of the lightfront dynamics. In this work, we introduce its application to the positronium system with a dynamical photon mediating the interaction between the positron and the electron. we show the nonperturbative Hamiltonian renorma ... More
Presented by Mr. Kaiyu FU on 17 Aug 2019 at 3:35 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
$N(1685)$ was firstly reported in the photoproduction of $\eta$ meson off the quasi-free neutron. Unlike other low-lying nucleon resonances whose Breit-Wigner (BW) widths are at least $100 {\;\rm MeV}$, the BW width of the $N(1685)$ is less than $30 {\;\rm MeV}$. The interpretation of the $N(1685)$ is still an open question. The non-strange pentaquark mass of all quark configurations is ev ... More
Presented by Kai XU on 21 Aug 2019 at 9:55 AM
Type: Leading parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Our experimental knowledge on hadron-hadron interactions is based mostly on scattering data and, in the case of systems with strangeness, the characterization of hypernuclei. The femtoscopy technique, by measuring the correlations between particle pairs with low relative momentum, has been used to measure the size of the QGP fireball created in relativistic heavy-ion collisions. Now we show how fe ... More
Presented by Oton VAZQUEZ DOCE on 18 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We intend to divide this talk into two parts: in the first one, stimulated by the new experimental LHCb findings associated with the $\Omega_c$ states, some of which we have described in previous work as being dynamically generated through meson-baryon interaction, we have extended this approach to make predictions for new $\Xi_{cc}$ molecular states (in the $C = 2$, $S = 0$ and $I = 1/2$ sector). ... More
Presented by Jorgivan DIAS on 20 Aug 2019 at 11:30 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We propose that the process of triple prompt J/ψ hadroproduction is a very clean hard probe of multiple-parton scatterings at high-energy hadron colliders, especially the least known triple-parton scattering. A first complete study is carried out by considering single-, double-, and triple-parton scatterings coherently. Our calculation shows that it is a golden channel to probe double- and triple ... More
Presented by Prof. Yu-Jie ZHANG on 18 Aug 2019 at 5:00 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
In order to study the properties of the $N^∗(1535)$ and $N^∗(1650)$ we calculate the mass distributions of $MB$ in the $Λ_c\rightarrow \bar{K}^0MB$ decay, with $MB=\pi N(I= 1/2)$, $\eta p$ and $K\Sigma(I= 1/2)$. We do this by calculating the tree-level and loop contributions, mixing pseudoscalar-baryon and vector-baryon channels using the local hidden gauge formalism. The loop contributions ... More
Presented by Shuntaro SAKAI on 20 Aug 2019 at 5:20 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We investigate the semileptonic B−c→ ̄νll X decays with X(=X(3930),X(3940),X(4160)) resonances. We take into account these resonances as dynamically generated from the vector–vector interaction in the charm sector. The X(3930) and X(3940) states are D∗ ̄D∗ molecules and the X(4160) is D∗s ̄D∗s molecule. We also look at the production of D∗ ̄D∗ and D∗s ̄D∗s close to th ... More
Presented by Dr. Natsumi IKENO on 20 Aug 2019 at 11:10 AM
Type: Plenary Session: Plenary session
Track: Plenary
An overview of recent results from LHC experiments on production of charm and beauty hadrons, and in particular quarkonia are presented. Experimental results on different production processes are confronted to available theoretical predictions.
Presented by Dr. Sergey BARSUK on 18 Aug 2019 at 9:40 AM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
A rich set of open heavy flavour states is observed by LHCb in pPb collisions collected at 5 and 8.16 TeV nucleon-nucleon center-of-mass energies. Thanks to the LHCb forward acceptance that is complementary to general purpose detectors, heavy-flavor hadrons can be studied down to zero pT. Presented in this talk is the measurements of production of beauty hadrons and open charm states including he ... More
Presented by Dr. Jiayin SUN on 21 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
We proposed a more general two-body scattering amplitude than the effective range expansion. Based on this new method, we found many new features on the exotic meson X(3872) that is not realized previously. It can either be a bound state of $\bar DD^*$ or a virtual state, or a simultaneous virtual and bound state in the physical and unphysical Riemann Sheet. We also found it can correspond to a h ... More
Presented by Xian-Wei KANG on 17 Aug 2019 at 3:35 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We have addressed the study of non-leptonic weak decays of heavy hadrons (Λ _b, Λ _c, B and D), with external and internal emission to give two final hadrons, taking into account the spin-angular momentum structure of the mesons and baryons produced. A detailed angular momentum formulation is developed which leads to easy final formulas. By means of them we have made predictions for a large amou ... More
Presented by Prof. Eulogio OSET on 20 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The quasi-probabilistic Wigner distributions are the quantum mechanical analog of the classical phase-space distributions. We investigate quark Wigner distributions for a quark state dressed with a gluon, which can be thought of as a simple composite and relativistic spin-1/2 state with a gluonic degree of freedom. We calculate various polarization configurations, namely unpolarized,longitudinally ... More
Presented by Sreeraj NAIR on 20 Aug 2019 at 11:50 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The explanation of the large $e^{+}e^{-}\rightarrow\pi^{+}\pi^{-}% \Upsilon\left(ns\right) $ $\left( n=1,2,3\right) $ widths at $\sqrt {s}=10.866\pm0.002$ GeV near the $\Upsilon\left( 10860\right) $ peak [1], about two orders of magnitude larger than those for $\Upsilon\left(ns\right)$$\rightarrow\pi^{+}\pi^{-}%$ $\Upsilon\left(1s\right)$ $\left( n=2,3,4\right) ,$ has been in recent y ... More
Presented by Prof. pedro GONZÁLEZ on 18 Aug 2019 at 2:25 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
LHCb results on quarkonia production in proton-lead collisions, using the data collected in 2016 at 8.16 TeV nucleon-nucleon centre-of-mass energy, in the forward region (pseudorapidity between 2 and 5) are presented, covering forward (pPb configuration) and backward (Pbp configuration) rapidities. Measurements include charmonia, where the prompt and from-b-decay components are disentangled, and b ... More
Presented by Prof. Zhenwei YANG on 21 Aug 2019 at 8:55 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Electromagnetic form factors serve to explore the intrinsic structure of nucleons and their strangeness partners. With electron scattering at low energies the electromagnetic moments and radii of nucleons can be deduced. The corresponding experiments for hyperons are limited because of their unstable nature. Only for one process this turns to an advantage: the decay of the neutral Sigma hyperon to ... More
Presented by Dr. Tomáš HUSEK on 17 Aug 2019 at 5:50 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The LHCb collaboration published new data on penta-quark states: three narrow states Pc(4312), Pc(4440), Pc(4457) are claimed. All of these states are higher than the threshold of NJ/psi threshold and appeared as narrow resonances in the scattering channel N-J/psi. We had analyzed these states in EPJC(2016)76:624 and PRD99(2019)014010. In this report we will reanalyze these states and the main po ... More
Presented by Prof. Hongxia HUANG on 21 Aug 2019 at 11:30 AM
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Over the past twenty years, one has seen remarkable progress in ab initio studies of nuclear structure and reactions with chiral nuclear forces. In a series of recent studies [1-5], we have shown that it is possible to construct chiral nuclear forces using covariant baryon chiral perturbation theory, which enjoy a number of appealing features. For instance, they are manifestly covariant and theref ... More
Presented by Dr. Lisheng GENG on 20 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
At the LHC, in ultra-peripheral heavy-ion collisions the highly boosted electromagnetic field of the beam particles represents a source of quasi-real photon. Vector meson photo-production measurements in Pb-Pb collisions are sensitive to the gluon parton distribution functions in the nucleus. LHCb results on charmonium production in ultra-peripheral Pb-Pb collisions as well as the prospects for fu ... More
Presented by Shanzhen CHEN on 20 Aug 2019 at 9:55 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The Spherical Neutral Detector (SND) collect data at the VEPP-2000 $e^+e^-$ collider in Novosibirsk. In this talk we present latest SND results on study of processes of $e^+e^-$ annihilation into exclusive hadronic states at c.m. energy below 2 GeV. In particular, we discuss measurement of the $e^+e^- \to \pi^+\pi^-$ cross section in the c.m. energy 0.52 - 0.88 GeV and the $e^+e^- \to n\bar{n}$ c ... More
Presented by Leonid KARDAPOLTSEV on 20 Aug 2019 at 9:55 AM
Type: Leading parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
With the world’s largest sample of J/psi 1.3 billion events accumulated at the BESIII detector offers a unique opportunity to study light hadron spectroscopy and decays. In this presentation, recent results of the light hadron physics at BESIII will be highlighted. The BESIII experiment has made significant progresses on the light hadron spectroscopy in the J/psi decays, including the amplitude ... More
Presented by Prof. Haiping PENG on 21 Aug 2019 at 8:30 AM
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The LHCb experiment at the LHC is a dedicated heavy flavour experiment studying hadrons containing bottom and charm quarks. During Run I (2010-2012) and Run II (2015-2018) LHCb has collected the world's largest sample of charmed hadrons which enables many studies of Charge-Parity violation (CPV) in the charm system with the highest precision up to this date. This talk will present current result ... More
Presented by Mr. Miroslav SAUR on 17 Aug 2019 at 2:30 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We will briefly review the Regge approach to the hadron spectrum and advocate a dynamical emergence of principal quantum number in the known spectrum of light non-strange mesons. Further we show how the linear radial trajectories with universal slope can be extended to heavy quarkonia and give a qualitative string interpretation. After that we propose a novel and non-string mechanism leading to a ... More
Presented by Sergei AFONIN on 20 Aug 2019 at 11:50 AM
Type: Poster Track: Posters
The high-precision differential cross-section data for the reaction gamma p -> K* Lambda are re-analyzed within a Regge-inspired effective Lagrangian approach. The model adopts Regge phenomenology to constrain the t-channel contributions from the kappa, K and K* exchanges. A minimum number of resonances in the s-channel are introduced in constructing the reaction amplitudes in order to describe th ... More
Presented by Dr. Aichao WANG
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
Radiative transitions between charmonium states have been widely studied theoretically and experimentally as probes reflecting their internal structure. In particular, since the constituent quark model can classify the excited states systematically, it has been useful tools for exploring undiscovered states and determining the quantum number of newly observed states. In recent years, the BES ... More
Presented by Dr. Tomohito MAEDA on 21 Aug 2019 at 9:55 AM
Type: Plenary Session: Plenary session
Track: Plenary
This is a review of light baryon spectroscopy
Presented by Stefan DIEHL on 21 Aug 2019 at 2:00 PM
Type: Poster Track: Posters
We consider the two-flavor version of the extended linear sigma model (eLSM), which contains (pseudo)scalar and (axial-)vector quark-antiquark mesons, a scalar glueball [predominantly corresponding to f0(1710)], as well as the nucleon and its chiral partner. We extend this model by the additional light scalar meson f0(500), predominantly a putative four-quark state. We investigate various interact ... More
Presented by Phillip LAKASCHUS
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Exotic hadrons close to the hadron-hadron threshold have been one of the interesting topics in the hadron and nuclear physics. Especially, in the heavy quark sector, some of the quarkonium-like states called XYZ and the hidden-charm pentaquark Pc near the thresholds have been discussed as a hadronic molecule. The hadronic molecules is realized as a loosely bound state of a hadron composite system. ... More
Presented by Yasuhiro YAMAGUCHI on 18 Aug 2019 at 5:40 PM
Session: Plenary session
Presented by Prof. Estia EICHTEN, Prof. Stephen OLSEN on 19 Aug 2019 at 11:20 AM
Type: Poster Track: Posters
A study of the e+e− -> π+π−π0 ηc process is performed using data samples collected with the BESIII detector at center-of-mass energies √s= 4.226,4.258,4.358,4.416, and 4.600GeV. The Born cross section times branching fraction product, σB(e+e−→π∓Zc(3900)±)× B(Zc(3900)±→ρ±ηc), is measured. The corresponding B(Zc±→ρ±ηc)/B(Zc±→π±J/ψ) ratio, which has been suggeste ... More
Presented by Junhao YIN
Type: Poster Track: Posters
We have studied the γp→ηϕp reaction within the effective Lagrangian approach by considering the contribution of the intermediate state ϕ(2170) production, and the background contributions of t-channel π0 and η mesons exchanges with the intermediate states N and N(1535). Our calculations show that there may be a peak, at least a bump structure around 2180 MeV associated to the resonance ϕ( ... More
Presented by Dr. En WANG
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
BESIII has collected data samples corresponding to luminosities of 2.93 fb-1 and 3.19 fb-1 at center-of-mass energies of 3.773 and 4.178, respectively. We report the measurements of the decays D(s)+ -> l+v (l=mu, tau), D0(+) -> K-bar(pi)l+v (l=e,mu), D0(+) -> K-bar(pi)pie+v, D0(+) -> a0(980)e+v, Ds+ -> eta(')e+v and Ds+ -> K(*)0e+v. From these analyses, the decay constants fD(s)+, the semileptonic ... More
Presented by Mr. Yue WANG on 17 Aug 2019 at 4:45 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
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 design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has completed a ... More
Presented by Ms. Hikari HIRATA on 17 Aug 2019 at 2:55 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
The kinematical coverage, statistical uncertainties of pion0-DVMP channel on EicC are studied using MC simulation. The detections of the final particles are preliminarily discussed. The low-energy Electron-Ion Collider in China would provide decent statistics of pion0-DVMP events. These data would help constrain the transversity GPDs and the polarized GPDs around small x and small skewness \xi.
Presented by Dr. Rong WANG on 20 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The PANDA experiment is one of the pillars of the new Facility for Antiproton and Ion Research (FAIR), currently under construction in Darmstadt, Germany. PANDA stands for antiProton ANnihilation at Darmstadt, and it will be a fixed-target experiment which will allow the study of non-perturbative phenomena of the strong interaction. These will be probed in antiproton-proton collisions in the beam ... More
Presented by Gabriela PÉREZ on 20 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
We present briefly a series of recent works on singly heavy baryons in a pion mean fi eld approach. In the limit of in finitely heavy-quark mass, the singly heavy baryon can be considered as a baryon that consists of Nc - 1 light valence quarks. The presence of the Nc - 1 valence quarks create the pion mean fields that arise from the vacuum polarization. Using this approach, we are able to comput ... More
Presented by Prof. Hyun-Chul KIM on 18 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
An all new detector, Solenoidal Large Intensity Device (SoLID), has been proposed for the Jefferson Lab 12 GeV era. A wide range of experiments were approved for SoLID. They include parity violation in deep inelastic scattering (PVDIS) to test the Standard Model at low energies, semi-inclusive deep inelastic scattering (SIDIS) to study the parton Transverse Momentum Distributions (TMD), Timelike C ... More
Presented by Dr. Zhiwen ZHAO on 20 Aug 2019 at 2:45 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We study the the ground state for $a_1$ meson and the next radial excitation of $a_1$ meson from a quenched lattice QCD simulation with the truncated overlap fermions formalism based on the domain wall fermions. Our results are consistent with the experimental values.
Presented by Dr. Masayuki WAKAYAMA on 18 Aug 2019 at 2:45 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
Deciphering the complicated structure around 4.2 GeV observed by many experiments, we embed only one charmoniumlike state $Y(4220)$ into the $J/\psi$ family, which plays a role of a scaling point when constructing higher charmonia above 4 GeV. To test this scenario, we provide the detailed decay properties of $Y(4220)$, and predict its partner as $\psi(4380)$ in a $4S$-$3D$ mixing scheme, whose ev ... More
Presented by Dr. Takayuki MATSUKI on 18 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In this work, we systematically calculate the mass spectra of the $S$-wave fully heavy tetraquark states $bb\bar b\bar b$, $cc\bar c\bar c$, and $bb\bar c\bar c$ in two nonrelativistic quark models. A tetraquark state may be an admixture of a $6_c-\bar 6_c$ state and a $\bar 3_c-3_c$ one, where $6_c-\bar 6_c$($\bar 3_c-3_c$) denotes the color configuration with a $6_c$ ($\bar 3_c$) diquark and a $ ... More
Presented by Dr. Guang-Juan WANG on 20 Aug 2019 at 5:00 PM
Type: Leading parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
We review recent lattice results from our collaboration (1) predicting strong-interaction-stable doubly heavy tetraquarks, and (2) investigating singly heavy exotic tetraquark channels where tetraquark candidates may be more easily accessible to experimental detection.
Presented by Kim MALTMAN on 20 Aug 2019 at 4:15 PM
Type: Plenary Session: Plenary session
Track: Plenary
This talk covers the status and future perspectives of hypernuclear physics.
Presented by Prof. Tomofumi NAGAE on 18 Aug 2019 at 11:55 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The study of the antikaon-nucleon system at very low energies plays a key role in the understanding of the strong interaction between hadrons in the strangeness sector. The information provided by the low energy kaon-nucleon interaction is accessible through the study of kaonic atoms. The lightest atomic systems, namely the kaonic hydrogen and the kaonic deuterium, provide the isospin dependent ka ... More
Presented by Johann ZMESKAL on 20 Aug 2019 at 9:15 AM
Type: Plenary Session: Plenary session
Track: Plenary
Status and perspectives of the nucleon structure measurements
Presented by Daria SOKHAN on 19 Aug 2019 at 9:05 AM
Type: Poster Track: Posters
In recent years the method of decay-pion spectroscopy was pioneered at the Mainz Microtron (MAMI). This method has the potential to achieve ground state mass measurements of light hypernuclei with unprecedented precision. It is aimed at statistical and systematic uncertainties in the Lambda binding energy of about 20 keV. Ongoing activities for hypertriton measurements at MAMI will be presented. T ... More
Presented by Patrick ACHENBACH
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
Heavy quarkonium production processes provide good tests of perturbative and nonperturbative aspects of QCD. We review the status of heavy quarkonium production phenomenology based on effective field theory methods. We give an overview of the nonrelativistic effective field theory treatment of exclusive and inclusive quarkonium production processes.
Presented by Dr. Hee Sok CHUNG on 18 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
COMPASS is a multi-purpose fixed-target experiment at CERN aimed at studying the structure and spectrum of hadrons. The two-stage spectrometer has a large acceptance over a wide kinematic range. Thus, it can be used to investigate a wide range of reactions. Diffractive production of mesons is studied with a negative hadron beam with a momentum of $190~\text{GeV}/c$. So far, COMPASS has studied ma ... More
Presented by Stefan WALLNER on 21 Aug 2019 at 8:55 AM
Type: Poster Track: Posters
PANDA at FAIR will address the physics of strangeness in nuclei by several novel measurements. These studies are only made possible by the one-of-a-kind combination of the stored antiproton beam at FAIR and the modular PANDA detector which will be complemented by a germanium detector array for high-resolution gamma-spectroscopy and a secondary target, in which low-momentum hyperons can be stopped ... More
Presented by Patrick ACHENBACH
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
Hadron spectroscopy is used to investigate the degrees of freedom of the constituents of the nucleon. Since the conception of the quark model, there have been descriptions of baryons and mesons with more then three and two valence quarks respectively. Such hadrons could manifest as penta- and tetraquarks, or as meson-meson and meson-baryon molecular like states. Candidates for such exotic matter w ... More
Presented by Mr. Georg SCHELUCHIN on 21 Aug 2019 at 11:10 AM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The modification of hadron properties in the strongly interacting environment resulting from heavy ion collisions (HIC) has been extensively studied for decades. However, in such highly dynamic processes it is difficult to address fundamental aspects. In fact, in-medium effects, which are expected to be present already at normal nuclear matter ($\rho_0$), can be studied in hadron-nucleus collisio ... More
Presented by Joana WIRTH on 21 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
We study the $\bar{K} \Xi$ decay mode of the newly observed $\Omega(2012)$ assuming that the $\Omega(2012)$ is a dynamically generated state with spin-parity $J^P = 3/2^-$ from the coupled channel $S$-wave interactions of $\bar{K}\Xi(1530)$ and $\eta \Omega$. In addition we also calculate its three-body decay width into $K\pi\Xi$. It is shown that the so-obtained total decay width is in ... More
Presented by Yin HUANG on 20 Aug 2019 at 2:45 PM
Type: Poster Track: Posters
Recently, LHCb collaboration has confirmed the state X(4100), with mass M = 4146.5±4.5 MeV, and much larger width 􀀀 = 83±21 MeV, comparing with the previous experimental measurements, which has confused the understanding of its nature. We will investigate the possible c1(3P) c¯c explanation of the X(4140), considering the mass spectra predicted in the quark model, and the strong decay p ... More
Presented by Dr. En WANG
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
We investigate the observed pentaquark candidates $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ from the latest LHCb measurement, as well as four possible spin partners in the $\bar{D}^{(*)}\Sigma_c^*$ system predicted from the heavy quark spin symmetry with the hadronic molecule scenarios. Similar to the previous calculation on $P_c(4380)$ and $P_c(4450)$, the partial widths of all the allowed decay c ... More
Presented by Yong-Hui LIN on 20 Aug 2019 at 3:05 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The primary goal of the GlueX experiment at Jefferson Lab is to search for and map the spectrum of light hybrid mesons. Many experiments have studied and reported evidence of exotic mesons decaying into $\eta\pi$ and $\eta'\pi$ final states. With a large acceptance to both charged and neutral particles, GlueX has access to both the neutral, $\gamma p\to\eta^{(')}\pi^{0}p$, and charged, $\gamma ... More
Presented by Dr. Colin GLEASON on 21 Aug 2019 at 11:10 AM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
$\Lambda_c(2765)^+$ (or $\Sigma_c(2765)$) is the lightest charm baryon of which presumable identification by quark models is not known. Currently, its properties are poorly known: $J^P$ and isospin are not determined and no uncertainty is given in the width measurement. With 980 $\mathrm{fb}^{-1}$ $e^+e^-$ collision data collected with Belle detector, we perform the determination of quantum numb ... More
Presented by Dr. Kiyoshi TANIDA on 18 Aug 2019 at 2:25 PM
Type: Poster Track: Posters
Experimental measured value of the muon magnetic moment $a_{\mu} = \frac{g_{\mu}-2}{2}$ has a long-standing and well known discrepancy comparing with Standard Model prediction that has been narrowed down within a range $3.2-3.6\,\sigma$ after years of efforts made by experimentalists and theoreticians. Previous results of dipion cross section $\sigma_{\pi\pi} = \sigma(e^+e^-\to\pi^+\pi^-)$ fr ... More
Presented by Dr. Xiaolin KANG
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
We discuss the $\bar{K}N$ correlation in high-energy nuclear collisions and its relation to the $\bar{K}N$ interaction. Given the source function, the hadron-hadron correlation can be useful to investigate the interaction. Recently, it has been shown by the ALICE collaboration that the effect of the threshold difference due to the isospin symmetry breaking is important for more detailed determinat ... More
Presented by Yuki KAMIYA on 18 Aug 2019 at 3:05 PM
Type: Poster Track: Session 2: Baryon spectroscopy
We study the single charm baryons in a non-relativistic quark model. We use the hypercentral approach to simplify three-body equation of the baryonic system. In our study, the spin-spin, spin-isospin and isospin-isospin interactions are calculated perturbatively. The mass spectra of the single charm baryons are calculated. The radiative decay width and the magnetic moments of the charm baryons ar ... More
Presented by Mr. Asadolah TAVAKOLINEZHAD
Type: Poster Track: Session 3: Exotic hadrons and candidates
A non-relativistic quark model is used to study heavy tetraquarks within a diquark-antidiquark configuration, where the four body system is considered as three subsequent two-body systems. The considered Hamiltonian is a combination of the linear confining, Coulombic and spin-spin interaction terms. Using the perturbation theory, we calculate the heavy meson spectra and then estimate the masses of ... More
Presented by Dr. Zahra GHALENOVI
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Electromagnetic form factors of baryons provide fundamental information about their structure and dynamics. They constitute a rigorous test of non-perturbative QCD as well as of phenomenological models. However, results in the time-like region have large uncertainties. The production cross section and form factors of hyperons are hardly explored. Based on 500 pb^-1 of data collected with the BESII ... More
Presented by Ms. Xiaorong ZHOU on 17 Aug 2019 at 2:30 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
A $\Sigma^*$ resonance with spin-parity $J^P = 1/2^−$ and mass in the vicinity of the $\bar{K}N$ threshold has been predicted in the five quark ficture and the unitary chiral approach. In this talk, based on the dominant Cabibbo favored weak decay mechanism, we perform a study of $\Lambda^+_c$ decays for studying the possible $\Sigma^*$ state decaying into $\pi \Lambda$ or $\pi \Sigma$. We show ... More
Presented by Dr. Ju-Jun XIE on 21 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
The nature of phi(2170) is still unclear. phi(2170) is proposed to be a traditional s s-bar state, an s s-bar g hybrid, a tetraquark state, a Lambda Lambda-bar bound state, or a phi KK resonance state. The predicted decay width of the individual explanations is quite different. Information from experiments on the known decay modes of phi(2170) is limited, and the measured values of mass and width ... More
Presented by Wenbiao YAN on 20 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Studies with kaonic atoms offer the unique opportunity to perform experiments at vanishing relative energies between the antikaon and the nucleon, because their atomic binding energies are in the keV range, far below the lowest energies of extracted beams for scattering experiments. Of particular interest are kaonic hydrogen atoms, because they offer an ideal framework to study strong-interaction ... More
Presented by Johann ZMESKAL on 18 Aug 2019 at 2:25 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The behavior of the $\phi$ meson in nuclear matter has attracted renewed interest because of (recent and future) experiments that aim to study its properties in nuclei [1-3]. Theoretically, many works have however been conducted assuming infinite nuclear matter [4-5], which is not realistic from an experimental point of view. To relate theoretical predictions with experimental observables, ... More
Presented by Dr. Philipp GUBLER on 21 Aug 2019 at 11:50 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
For the first time, we have measured single beam spin asymmetries to extract $A_{LU}^{sin(\phi)}$ moments from the hard exclusive π$^{+}$ channel off the unpolarized hydrogen target in a wide range of kinematics from forward angles to backward angles in the center of mass frame. While many experiments showed the QCD factorization mechanism in the "nearly forward region" (large Q² and small |t| ... More
Presented by Dr. Stefan DIEHL on 20 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We propose a tetraquark mixing framework for the two light-meson nonets in the $J^P = 0^+$ channel, the light nonet $f_0(500), f_0(980), a_0(980), K_0^∗(800)$ and the heavy nonet $f_0(1370), f_0(1500), a_0(1450), K_0^∗(1430)$. According to this framework, one can introduce two types of tetraquark with different spin configuration, $|J, J_{12}, J_{34}⟩ = |000⟩, |011⟩$, where $J$ is the ... More
Presented by Dr. Hungchong KIM on 21 Aug 2019 at 11:30 AM
Type: Poster Track: Posters
We perform a theoretical study of the $\chi_{cJ} \to \phi K^* \bar K \to \phi K\pi \bar K$ reaction taking into account the $K^* \bar K$ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, for the formation of the low lying axial vector mesons, in this case the $h_1(1380)$ given the selection of quantum numbers. Based on this picture we ... More
Presented by Ms. Sheng-Juan JIANG
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Deeply Virtual Compton Scattering (DVCS) is the simplest exclusive process to access Generalized Parton Distributions (GPDs). GPDs encode the correlation between the spacial distribution of partons inside the nucleon and their momentum. An upcoming DVCS experiment in Hall C at Jefferson Lab (Virginia, U.S.A.) will provide the highest precision data in a vast $Q^2$-$x_B$ region accessible by a 11 G ... More
Presented by Ho San KO on 20 Aug 2019 at 8:55 AM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
Hamiltonian effective field theory has been used for explaining Lattice data. We develop it within partial waves mixing in the rest frame. The dimension of the Hamiltonian can be highly reduced with the partial wave cut-off and rotation symmetry. We apply this method to extract the Pion-Pion s-, d- and f-wave phase shifts within Isospin=2 case.
Presented by Yan LI on 17 Aug 2019 at 5:10 PM
Type: Leading parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Electron Ion Collider (EIC), regarded as the ”super electron microscope”, can provide the clearest image inside of the nucleon. It is the most ideal tool to understand the internal structure of the nuclear matter, especially the quark-gluon structure of the nucleon and nuclei. Polarized EICs are the next generation ”multi-dimensional electron microscopes” that are most effective in studyin ... More
Presented by Dr. Yutie LIANG on 20 Aug 2019 at 2:00 PM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
The chiral phase transition temperature $T_{c}^{0}$ is a fundamental quantity of QCD. To determine this quantity we have performed simulations of (2 + 1)-flavor QCD using the Highly Improved Staggered Quarks (HISQ/tree) action on $N_{\tau}=6, 8$ and 12 lattices with aspect ratios $N_{\sigma}/N_{\tau}$ ranging from 4 to 8. In our simulations the strange quark mass is fixed to its physical value ... More
Presented by Mr. Sheng-Tai LI on 18 Aug 2019 at 5:00 PM
Type: Leading parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The notable absence of a low-lying energy level in the positive parity sector of the nucleon excitation spectrum in lattice QCD has been a point of interest for some time. Speculation about the potential role of chiral symmetry in the lattice nucleon spectrum has arisen recently as a possible explanation for this absence. We endeavour to address this issue through a systematic comparison of the c ... More
Presented by Waseem KAMLEH
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
In this talk I will discuss the triangle mechanism in Lambda_c decay and isospin-violating Lambda(1405).This process is prohibited by the isospin symmetry, but the decay into this channel is enhanced by the contribution of the triangle diagram, which is sensitive to the mass of the internal particles. Interestingly, a first narrow peak was observed in the pi0 Sigma0 invariant mass dist ... More
Presented by Lianrong DAI on 20 Aug 2019 at 11:50 AM
Type: Poster Track: Posters
Within the framework of non-relativistic QCD, the indirect production of semi-inclusive doubly heavy baryons ($\Xi_{cc}$, $\Xi_{bc}$ and $\Xi_{bb}$) via four main Higgs decay channels and one main top quark decay channel are presented. The contributions from the intermediate diquark states, $\langle bc \rangle [^3 S_1]_{\bar{3}/6}$, $\langle bc \rangle [^1 S_0]_{\bar{3}/6}$, $\langle cc \rangle [^ ... More
Presented by Dr. juanjuan NIU
Type: Poster Track: Posters
The helicity amplitude of the process $\gamma^*N\rightarrow N(1440)$ is evaluated in a relativistic quark model. The wave functions of the baryons are extracted by fitting the theoretical result to the experimental data. The findings of the work are consistent with that the $N(1440)$ is mainly a three-quark bound state.
Presented by Mr. Attaphon KAEWSNOD
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
The pion-nucleon interaction is an interesting topic and has attracted more attentions of the nuclear society in the past decades. There are two very closed excited states of the nucleon in the $S_{11}$ channel, $N(1535)$ and $N(1650)$, which are difficult to be described within the framework of the constituent quark model. However, in the unitary coupled-channel approximation of the Bethe-Sa ... More
Presented by Dr. Bao-Xi SUN on 21 Aug 2019 at 9:35 AM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
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Presented by Dr. En WANG on 20 Aug 2019 at 11:30 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
In this work, we use the dispersion theory to provide a physical description of recent BESIII data on the reaction $ e^+ e^- \to \psi (2S) \, \pi^+ \, \pi^-$ [1]. Taking into account explicitly the effects of charged exotic intermediate states in the $t$- and $u$-channels as well as the two-pion final state interaction, we describe the invariant mass distribution for four different $e^+ e^-$ cen ... More
Presented by Daniel MOLNAR on 21 Aug 2019 at 8:55 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Since Pc(4380) and Pc(4450) were discovered by LHCb collaboration in 2015, the nature of two pentaquarks is still veiled. Recently, three pentaquark states, Pc(4312), Pc(4440), Pc(4457) were discovered by LHCb with more precision, which inspired us to explore the nature of three pc states. In this talk, I will discuss the implementation of effective field theory to describe the three pentaquark ... More
Presented by Mr. Ming-Zhu LIU on 18 Aug 2019 at 5:20 PM
Type: Poster Track: Posters
Since 2010 the VEPP-2000 electron-positron collider has been operated at Budker Institute of Nuclear Physics in the center-of-mass (c.m.) energy range from $\sqrt{s}=320$ MeV to $2000$ MeV. VEPP-2000 has two interaction regions in which the Cryogenic Magnetic Detector (CMD-3) and the Spherical Neutral Detector (SND) are installed. Production of four charged pions in $e^+ e^-$ annihilation ... More
Presented by Mr. Alexandr KOROBOV
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
The vector-vector approach is revisited. In the original formalism, some approximations are made, considering the vector meson to have small momenta comparing to its mass. In the $\rho-\rho$ scattering, and for Isospin$=0$, the potential obtained is much more attractive in $J=2$ than for $J=0$, and thus, two bound states are found, where the one with $J=2$ is more bound. These are identified with ... More
Presented by Dr. R. MOLINA on 17 Aug 2019 at 5:50 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Many Ξc and Ξb resonances have been observed during past few of years. This works focus on studying several Ξc and Ξb dynamically generated states from meson-baryon interactions in coupled channels, using an extension of the local hidden gauge approach that we then unitarize using the Bethe-Salpeter equation. We are then able to identify several of our poles in the charm sector with some of th ... More
Presented by Rafael PAVAO on 17 Aug 2019 at 5:50 PM
Type: Parallel Session: Session 2: Baryon sepctroscopy
Track: Session 2: Baryon spectroscopy
In this work we study the possibility that the newly observed Ω(2012) is a molecular state dynamically generated from the KΞ*, ηΩ and KΞ channels. Using this picture, we find a state that has a large coupling to KΞ*, which can be observed in the Ω(2012) → KπΞ decay. This three body decay is automatically incorporated in our chiral unitary approach by considering the mass distribution of ... More
Presented by Rafael PAVAO on 21 Aug 2019 at 8:55 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We have made a study of the $J/\psi\rightarrow\eta'h_1$, $\eta h_1$ (with $h_1$ being $h_1 (1170)$ and $h_1 (1380)$), $J/\psi\rightarrow\pi^0 b_1 (1235)^0$ and $\chi_{cJ}\rightarrow \phi h_1(1380)$ assuming the axial vector mesons to be dynamically generated from the pseudoscalar-vector meson interaction. For the $J/\psi$ decays, we obtain fair agreement with experimental data and provide an expl ... More
Presented by Shuntaro SAKAI on 18 Aug 2019 at 3:05 PM
Type: Plenary Session: Plenary session
Track: Plenary
This is a review of the theoretical developments in understanding the heavy-light mesons and baryons.
Presented by Dr. Juan NIEVES on 17 Aug 2019 at 11:05 AM
Type: Plenary Session: Plenary session
Track: Plenary
This talk reviews the theoretical aspects of the XYZ and Pc states. Triangle singularities will also be discussed.
Presented by Prof. Qiang ZHAO on 19 Aug 2019 at 10:45 AM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
We study the Okubo-Zweig-Iizuka (OZI) allowed three body open flavor decay properties of higher vector charmonium and bottomonium states with an extended quark pair creation model. For the bottomonium system, we get that (i) the $BB\pi$ and $B^{\ast}B^{\ast}\pi$ partial decay widths of the $\Upsilon(10860)$ state are consistent with the experiment, and the $BB^{\ast}\pi$ partial decay width ... More
Presented by Xin-Zhen WENG on 18 Aug 2019 at 3:25 PM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
The LHCb collaboration has reported recently three pentaquark states found in the $J/\psi N$ mass distribution. Based on the constraints of the heavy quark spin symmetry combined with the local hidden gauge symmetry, we investigate the ${\bar D}^{(*)}\Sigma_c^{(*)}$ interactions, together with $J/\psi N$ and other coupled channels, using a coupled channel approach. From the poles found in the seco ... More
Presented by Dr. Chu-Wen XIAO on 18 Aug 2019 at 5:00 PM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
Lattice QCD calculations provide an ab initial access to hadronic process. These calculations are usually performed in a small cubic volume with periodic boundary conditions. The infinite volume extrapolations for three-body systems are indispensable to understand many systems of high current interest. We derive the three-body quantization condition in a finite volume using an effective field theo ... More
Presented by Jin-Yi PANG on 17 Aug 2019 at 5:30 PM
Type: Parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The discovery of doubly heavy baryon provides us with a new platform for precisely testing the SM and exploring the new physics. Based on our previous works, we investigate the form factors of the transition $b\to c,u,d,s$ and $c\to d,s$ of double heavy baryons using the light-front quark model. Then we apply the these transition form factors to predict the partial widths for the semi-lepton decay ... More
Presented by Ms. Xiao-Hui HU on 20 Aug 2019 at 11:10 AM
Type: Parallel Session: Session 3: Exotic hadrons and candidates
Track: Session 3: Exotic hadrons and candidates
Through the Born-Oppenheimer Approximation, we have performed a comprehensive investigation of the DD*K, BB*K and BBB* molecular states. In the framework of One-Pion Exchange model as well as the treatments of the coupled-channel efects and S-D wave mixing, we find loosely bound tri-meson molecular states of these systems with some specific isospin configuration. We also predict that a tri-meson m ... More
Presented by Dr. Li MA on 21 Aug 2019 at 11:50 AM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
BESIII Collaboration has reported the observation of $a_0^0(980)-f_0(980)$ mixing. From the Dalitz plot of BESIII's paper for the decay $\eta \rightarrow \gamma \gamma$, one can see that there is a peak around $1.4$ GeV on $\pi^0 \phi$ distribution. In general, this peak can be interpreted as a dynamically resonance state or a kinematic effect. In this paper, by using the effective Lagrangian meth ... More
Presented by Mr. Hao-Jie JING on 20 Aug 2019 at 9:15 AM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
We study the J/ψ to K K f0(980) reaction and find that the mechanism to produce this decay develops a triangle singularity at K f0 invariant mass around 1515 MeV. We find the branching ratio obtained for this decay to be of the order of 10^{−5}, accessible in present facilities.
Presented by Dr. Hua-Xing CHEN on 20 Aug 2019 at 9:55 AM
Type: Parallel Session: Session 7: Hadrons in hot and nuclear environment including hypernuclei
Track: Session 7: Hadrons in hot and nuclear environment including hypernuclei
We perform the Hypernuclear No-Core Shell Model (NCSM) calculations to study the uncertainty of hypertriton binding energy. In particular, we employ a family of nucleon-nucleon (NN) nuclear interactions at next-to-next-to-leading-order (NNLO) in chiral effective field theory to approximate the uncertainty of the nuclear interaction in combination with a fixed leading-order (LO) chiral hyperon-nucl ... More
Presented by Ms. Thiri Yadanar HTUN on 21 Aug 2019 at 11:30 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Dynamical chiral symmetry breaking and confinement are two emergent phenomena of QCD, orchestrating the observed spectrum of hadrons and their properties. The running of the corresponding mass function reflects itself in several physical observables such as form factors and parton distribution functions inside hadrons. This study can be naturally carried out through QCD’s fundamental field equat ... More
Presented by Raya KHEPANI on 17 Aug 2019 at 5:50 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
I will present recent lattice QCD calculations on x-dependent valance parton distribution function (PDF) of pion. Results for both quasi- and pseudo-PDF using unprecedented fine lattices will be presented. Implications of these QCD-based results on the moments and large-x behavior of the pion light-cone PDF will be discussed.
Presented by Swagato MUKHERJEE on 17 Aug 2019 at 5:10 PM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We apply the basis light-front quantization framework to solve for the structures of mesons with light and strange valence quarks. Our approach treats mesons as relativistic bound states with quarks confined in both the transverse direction and the light-front longitudinal direction. The spin-orbit interactions of these confined quarks are further specified by the Nambu--Jona-Lasinio model. We add ... More
Presented by Shaoyang JIA on 20 Aug 2019 at 5:20 PM
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
In this work we discuss how to construct the Regge trajectories for light mesons and baryons in the context of a bottom-up holographic model consisting on a five-dimensional AdS background deformed with a quadratic function in the holographic coordinate. We fit the scalar meson $f_0$, vector meson rho, baryons with spin $1/2^+$ and spin $3/2^+$ trajectories. These results are in fine agreement wi ... More
Presented by Dr. Miguel Angel MARTIN CONTRERAS on 21 Aug 2019 at 11:50 AM
Type: Parallel Session: Session 5: Analysis tools
Track: Session 5: Analysis tools
The light-meson spectrum can be studied by analyzing data from diffractive dissociation of pion or kaon beams. The contributions of the various different states that are produced in these reactions are disentangled by the means of partial-wave analysis. A challenge in these analyses is that the partial-wave expansion has to be truncated, i.e. that only a finite subset of t ... More
Presented by Florian KASPAR on 17 Aug 2019 at 2:55 PM
Type: Leading parallel Session: Session 4: Hadron decays, production and interactions
Track: Session 4: Hadron decays, production and interactions
The first observed double-heavy baryon, $\Xi_{cc}^{++}$, was discovered by its weak decays. The discovery channel, $\Xi_{cc}^{++} \to \Lambda_c^+ K^- \pi^+ \pi^+$, and the confirmed mode, $\Xi_{cc}^{++}\to \Xi_c^+\pi^+$, were both predicted in theory by the factorization approach with the rescattering mechanism for the final-state-interaction effect. We will report the recent progress on the studi ... More
Presented by Prof. Fu-Sheng YU on 20 Aug 2019 at 10:45 AM
Type: Leading parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
I will review the status of mesons with heavy quarks. The insights these states give into QCD dynamics and the outstanding issues will be discussed. Specific examples of theoretical issues and needed experimental inputs are presented for heavy-light, quarkonium-like and possible exotics states.
Presented by Estia EICHTEN on 20 Aug 2019 at 8:30 AM
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
We investigate the Wigner distributions of the pion using a holographic light-front pion wavefunction with dynamical spin effects to unravel the spatial and spin structure. Using a universal AdS/QCD scale and constituent quark masses, we find that the dynamical spin effects are maximal in the pion where they lead to an excellent simultaneous description of a wide range of data: the decay consta ... More
Presented by Chandan MONDAL on 20 Aug 2019 at 5:00 PM
Type: Poster Track: Posters
Using 5.2 fb-1 e+e- annihilation data samples collected with the BESIII detector, we measure the cross sections of e+ e- -> Ks K pi pi0 and KsK pi eta at the center-of-mass energies from 3.90 to 4.60 GeV. In addition, the charmoniumlike resonance Y(4260) and Zc(3900) decay into the two decay modes are also searched for.
Presented by Chengwei WANG
Type: Parallel Session: Session 1: Meson spectroscopy
Track: Session 1: Meson spectroscopy
We report a new measurement of the $e^+e^-\to \Upsilon(nS)\pi^+\pi^-$ ($n=1,2,3$) cross sections at energies from 10.52 to 11.02 GeV, where we observe a new structure in the energy dependence of the cross sections and find evidence for the $\Upsilon(1S)\pi^+\pi^-$ production below the $B\bar{B}$ threshold. Along with this we also present observation of $e^+e^- \to \gamma \chi_{c1}$ and search ... More
Presented by Dr. Simon EIDELMAN on 20 Aug 2019 at 8:55 AM
Type: Poster Track: Posters
We study the process of e+e- ->gamma omega J/psi with 11.6 fb-1 e+e- annihilation data taken at center-of-mass energies from 4.008 GeV to 4.600 GeV with the BESIII detector at the BEPCII storage ring. X(3872)->omega J/psi is observed with more than 5 sigma significance for the first time. The X(3872) mass is measured to be 3873.3 +- 1.1+- 1.0 MeV. The ratio of the decay rate of X(3872)->omega J/ps ... More
Presented by Hang ZHOU
Type: Parallel Session: Session 6: QCD and hadron structure
Track: Session 6: QCD and hadron structure
Basis Light-front Quantization (BLFQ) is a non-perturbative method for solving bound state problems in the light-front Hamiltonian formalism. It has already been used to study QED and QCD systems like the positronium and quarkonium. In this work, we apply BLFQ to investigate the baryon system. We restrict ourselves to the valence sector and adopt an effective Hamiltonian which contains the confini ... More
Presented by Mr. Siqi XU on 20 Aug 2019 at 11:30 AM