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Article
Physics, Nuclear
E. Ya. Paryev
Summary: In this study, we investigate the near-threshold J/psi meson photoproduction from protons and nuclei. We consider both direct non-resonant and two-step resonant production processes. Our calculations show that the measurement of the P ci+ pentaquark states will be challenging, but the combined energy and momentum distributions of J/psi mesons can provide valuable information for confirming the existence of these resonances.
Review
Physics, Multidisciplinary
Hua-Xing Chen et al.
Summary: The past decades have seen significant advancements in hadron physics, particularly in the observation of excited open heavy flavor mesons and baryons since 2017. This review provides updated information on the recent experimental and theoretical developments in this field, including the observation of unconventional heavy hadrons, tetraquark states, and hidden heavy flavor multiquark states. Additionally, the review covers progress in understanding glueballs and light hybrid mesons, which are manifestations of the non-Abelian SU(3) gauge interaction in Quantum Chromodynamics at low energies.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Multidisciplinary Sciences
B. Duran et al.
Summary: The proton, composed of quarks and gluons, is one of the fundamental building blocks of visible matter in the Universe. Previous research focused on the electric charge radius of the proton, while little was known about the mass density dominated by gluons. This study investigated the gravitational density of gluons using a small color dipole and determined the gluonic gravitational form factors of the proton. The results showed a notably smaller mass radius than the electric charge radius, and in some cases, the determined radius agreed well with theoretical predictions.
Review
Physics, Multidisciplinary
Lu Meng et al.
Summary: Chiral symmetry and its spontaneous breaking are essential in both light and heavy hadron systems. Chiral perturbation theory (LPT) is an effective field theory of Quantum Chromodynamics. This paper reviews the research on chiral corrections to the properties of heavy mesons and baryons using LPT, as well as the scattering of light pseudoscalar mesons and heavy hadrons, which helps in understanding new resonances. Furthermore, this paper also discusses the progress on heavy hadronic molecular states within the framework of left, emphasizing the common chiral dynamics governing nuclei and the formation of deuteron and also the shallow bound states or resonances composed of two heavy hadrons.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Review
Physics, Multidisciplinary
Xu Cao
Summary: Accessing the full image of hadrons and investigating the structure of exotic candidates are the central endeavors of modern particle physics. This article provides a concise overview of the efforts to search for exotic narrow N* and Z states, and discusses the future perspectives for exploring these states in electron-ion colliders.
FRONTIERS OF PHYSICS
(2023)
Review
Multidisciplinary Sciences
Hongxia Huang et al.
Summary: This article focuses on the recent experimental and theoretical progress on exotic states from the perspective of the quark model. While lattice quantum chromodynamics may provide the final answer, phenomenological models remain powerful tools to explore and gain insights into the exotic states and hadron phenomenology.
Article
Physics, Nuclear
Qi Xin et al.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Physics, Particles & Fields
Qiang Li et al.
Summary: Based on the effective Lagrangian in the heavy quark limit, this study calculates the one-boson-exchange interaction kernel of P-psi(N) (4312)(+) as the (D) over bar Sigma(c) molecular state and solves the Bethe-Salpeter equation to obtain its wave function. The results, roughly consistent with experimental measurements and other theoretical research, indicate that the (D) over bar Sigma(c) channel is a highly promising channel for future experiments.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Ye Yan et al.
Summary: This study aims to explore the low-lying fully heavy pentaquark systems composed of charm and bottom quarks in the chiral quark model, inspired by the discovery of fully heavy tetraquark states by LHCb, ATLAS and CMS Collaborations. Through channel-coupling, several fully heavy pentaquark candidates with different quantum numbers are obtained, suggesting that they are likely to be molecular states. These exotic states may provide new ideas for experimental searches, and further experimental and theoretical research is expected in the future to study and understand these fully heavy states.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
K. Azizi et al.
Summary: A candidate triple strange pentaquark state, P-csss, is investigated through its strong decay channel P-csss -> C2-J=y/. Two possible interpolating currents with spin-parity JP 1/4 1 - are used to calculate the relevant strong coupling constants. The chosen currents couple to both positive and negative parity states simultaneously, and the decay widths are obtained for both parities. These results may provide insights into future experimental observations and characterization of such candidate states.
Article
Astronomy & Astrophysics
B. Z. Kopeliovich et al.
Summary: In this study, heavy quarkonium production in ultraperipheral nuclear collisions (UPC) is described using the QCD dipole formalism. Realistic quarkonium wave functions were calculated by solving the Schrodinger equation and applying a Lorentz boost to high energy. Different Q potentials were used to accurately describe quarkonium masses, decay widths, and data on diffractive electroproduction. Nuclear effects were included using dipole cross sections fitted to deep-inelastic scattering (DIS) data. The results agree well with available data from the LHC and can be verified in future experiments at electron-ion colliders.
Article
Physics, Particles & Fields
Chao-Wei Shen et al.
Summary: Using an effective Lagrangian with heavy quark spin symmetry, this study investigates the coupled-channel dynamics of the doubly charmed systems D-(*) Sigma((*))(c). The potential considered includes exchanges of pseudoscalar and vector mesons in the t-channel. By applying the first iterated solution of the N/ D method, several S-wave bound states with isospin I = 1/2 are discovered. These states correspond to open-charm partners of the hidden charm pentaquarks P-psi(N) observed by the LHCb Collaboration.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Nuclear
Igor Strakovsky et al.
Summary: New high-statistics data from the GlueX experiment are used to search for an exotic state observed by the LHCb collaboration. A dip structure is observed at the same location as a similar structure in the LHCb data, indicating destructive interference involving certain resonances.
Article
Physics, Multidisciplinary
R. Aaij et al.
Summary: This study reported observing a hadronic state containing four quarks in the Large Hadron Collider experiment, with notable mass and resonance characteristics.
Review
Physics, Nuclear
J. Arrington et al.
Summary: This article summarizes the ongoing scientific program of the 12 GeV Continuous Electron Beam Accelerator Facility (CEBAF) and provides an outlook into future opportunities. The program focuses on important topics in nuclear, hadronic, and electroweak physics, including nuclear femtography, meson and baryon spectroscopy, quarks and gluons in nuclei, precision tests of the standard model, and dark sector searches. The potential upgrades of CEBAF and their impact on scientific reach are also discussed, such as higher luminosity, the addition of polarized and unpolarized positron beams, and doubling the beam energy.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2022)
Article
Multidisciplinary Sciences
R. Aaij et al.
Summary: This study reports the discovery of a narrow exotic state in the (DD0)-D-0 pi(+) mass spectrum, which is consistent with a tetraquark state with specific quark content and spin-parity quantum numbers. The study also reveals an unexpected dependence of the production rate on track multiplicity.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Particles & Fields
K. Azizi et al.
Summary: This study presents an analysis of a hidden charmed pentaquark candidate state with double strange quark. The mass prediction and partial decay widths of the state are obtained using two-point and three-point QCD sum rule methods. The results provide valuable information for future experimental searches and discrimination of similar states.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Nuclear
J. J. Cobos-Martinez et al.
Summary: In this study, the nuclear bound-state energies of Upsilon and eta(b) mesons were calculated for various nuclei, neglecting any effects of widths. The medium-modified B and B* meson masses, as well as the density distributions in nuclei, were calculated using the quark-meson coupling (QMC) model. The attractive potentials for Upsilon and eta(b) mesons in nuclei were calculated based on the mass shifts of these mesons in nuclear matter. The results suggest that Upsilon and eta(b) mesons should form bound states with all the nuclei considered.
Article
Multidisciplinary Sciences
R. Aaij et al.
Summary: The first evidence of a structure in the J/psi Lambda invariant mass distribution is obtained from an amplitude analysis of Xi(-)(b) -> J/psi Lambda K- decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness. Additionally, narrow excited Xi(-) states have been seen for the first time in a Xi(-)(b) decay.
Article
Physics, Nuclear
G. N. Zeminiani et al.
Summary: This study estimates the mass shifts of Upsilon, eta(b), and B* mesons in symmetric nuclear matter, and examines the different interactions strengths between bottomonium and charmonium. The results show a significant difference in the interaction strengths between bottomonium and charmonium.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Astronomy & Astrophysics
Peng Sun et al.
Summary: The study applies perturbative QCD to investigate near-threshold heavy quarkonium photoproduction at large momentum transfer. It reveals a modified power counting method and the dominance of the three quark Fock state with nonzero orbital angular momentum. The results have significant implications for the interpretation of experiment measurements in terms of the gluonic gravitational form factors of the proton.
Article
Astronomy & Astrophysics
Dmitri E. Kharzeev
Summary: The mass radius of the proton was determined using the form factor of the trace of the energy-momentum tensor of QCD, with a resulting value of Rm = 0.55 +/- 0.03 fm. This value was found to be significantly smaller than the charge radius of the proton, with the difference attributed to the effects of asymptotic freedom and spontaneous breaking of chiral symmetry in QCD. Future measurements are needed to further refine the determination of the mass radius.
Article
Physics, Particles & Fields
J. Ferretti et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Nuclear
E. Ya Paryev
Article
Astronomy & Astrophysics
Yoshitaka Hatta et al.
Review
Physics, Multidisciplinary
Nora Brambilla et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2020)
Article
Physics, Multidisciplinary
Xurong Chen et al.
Article
Multidisciplinary Sciences
R. Aaij et al.
Article
Physics, Particles & Fields
Jun-Tao Zhu et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Particles & Fields
Meng-Lin Du et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Review
Physics, Nuclear
Yan-Rui Liu et al.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2019)
Article
Physics, Particles & Fields
Jan Cepila et al.
EUROPEAN PHYSICAL JOURNAL C
(2019)
Article
Physics, Multidisciplinary
A. Ali et al.
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Particles & Fields
Bo Wang et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Astronomy & Astrophysics
D. Winney et al.
Article
Computer Science, Interdisciplinary Applications
Spencer R. Klein et al.
COMPUTER PHYSICS COMMUNICATIONS
(2017)
Review
Physics, Nuclear
A. Accardi et al.
EUROPEAN PHYSICAL JOURNAL A
(2016)
Article
Physics, Nuclear
Amruta Mishra et al.
Article
Physics, Nuclear
BG Yu et al.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2006)
Article
Physics, Nuclear
BG Yu et al.
Article
Astronomy & Astrophysics
E Martynov et al.
Article
Physics, Particles & Fields
E Martynov et al.
EUROPEAN PHYSICAL JOURNAL C
(2002)
Article
Physics, Nuclear
Z Rudy et al.
EUROPEAN PHYSICAL JOURNAL A
(2002)
Article
Astronomy & Astrophysics
SJ Brodsky et al.
Article
Physics, Nuclear
EY Paryev
EUROPEAN PHYSICAL JOURNAL A
(2000)
