Article
Astronomy & Astrophysics
Michael C. Abbott, Zoltan Bajnok, Janos Balog, Arpad Hegedus
Summary: In this study, we investigate the resurgent trans-series for the free energy of the two-dimensional O(4) sigma model in a magnetic field. By exploiting integrability, very high-order perturbative data is obtained, allowing exploration of non-perturbative sectors. Leading real-valued exponentially small terms are determined exactly and confirmed against direct numerical solutions, showing complete agreement.
Article
Physics, Particles & Fields
Zhi-Tian Zou, Lei Yang, Ying Li, Xin Liu
Summary: The study shows that the calculated results in the perturbative QCD approach are consistent with experimental measurements, indicating the reliability of observations of these quasi-two-body decays. In addition, branching fractions of other quasi-two-body decays were also calculated based on the narrow-width approximation, with hopes of validation in future experiments.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Wen-Jing Xing, Guang-You Qin, Shanshan Cao
Summary: Although perturbative QCD is sufficient for understanding parton energy loss and jet quenching at large transverse momentum in heavy-ion collisions, the simultaneous description of heavy flavor nuclear modification factor RAA and elliptic flow coefficient v2 at low and intermediate pT still remains a challenge due to the effects from non-perturbative interactions. In this work, we extend the linear Boltzmann transport model by implementing a generalized Cornell-type potential that incorporates both short-range Yukawa interaction and long-range color confining interaction between heavy quarks and the QGP medium. The combination of this new approach with other models allows for a satisfactory description of heavy meson RAA and v2 observed at both RHIC and the LHC.
Article
Physics, Nuclear
Zhi-Qing Zhang, Yan-Chao Zhao, Zhi-Lin Guan, Zhi-Jie Sun, Zi-Yu Zhang, Ke-Yi He
Summary: In this study, we investigate quasi-two-body B-(s) K*gamma K pi gamma decays using the perturbative QCD approach. Two-meson distribution amplitudes are introduced to describe the final state interactions of the K pi pair. Our results are in agreement with experimental data, suggesting that analyzing these quasi-two-body B decays in the three-body framework is more appropriate.
Article
Physics, Multidisciplinary
D. R. Entem, J. A. Oller
Summary: Chiral Effective Field Theory (chi EFT) has been widely used in studying the NN interaction over the past three decades. This work reviews methods aimed at completely eliminating cut-off dependencies, such as renormalization with boundary conditions, renormalization with one counter term in momentum space, and the exact N/D method. These methods are compared and the exact N/D method is shown to be able to renormalize singular repulsive interactions beyond others.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2021)
Article
Astronomy & Astrophysics
Sheng Lu, Mao-Zhi Yang
Summary: In this study, we use a modified perturbative QCD approach to investigate B -xx decay, considering the transverse momenta of partons for calculating branching ratios and CP violation. Sudakov factors associated with each meson are included to suppress soft contribution in QCD. However, the suppression by the Sudakov factor alone is not sufficient, so we introduce a soft scale cutoff and soft form factors for Bx transition and xx production. The main next-to-leading-order contributions, including vertex correction, quark-loop, and magnetic penguin, are taken into account. To address the long-standing puzzle of B0 -x0x0 decay, where the theoretical prediction of the branching ratio is significantly smaller than experimental data, we introduce a color-octet matrix element that captures long-distance dynamics. With reasonable parameter values, all the branching ratios and CP violation are in good agreement with experimental data.
Article
Physics, Particles & Fields
Dong Huang, Tao Zhong, Hai-Bing Fu, Zai-Hui Wu, Xing-Gang Wu, Hong Tong
Summary: Based on different scenarios regarding the K-0*(1430) particle, the K-0*(1430) leading-twist distribution amplitude is studied using the QCD sum rules and background field theory. A more reasonable sum rule formula is suggested to evaluate the xi-moments of the K-0*(1430). A new light-cone harmonic oscillator model is established to describe the leading-twist distribution amplitude of the K-0*(1430). The study also calculates the transition form factors and branching fractions for B-s, D-s -> K-0*(1430) semileptonic decays using the light-cone QCD sum rules.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Hongsheng Zhang
Summary: This study shows that a deviation from general relativity leads to exact vacuum spherical gravitational waves, regardless of how tiny this deviation is, and that the existence of these waves is a non-perturbative property of gravities. The research also investigates the energy carried by these non-perturbative waves and demonstrates the related metrics in f(R) gravity.
Article
Physics, Particles & Fields
U. Egede, T. Hadavizadeh, M. Singla, P. Skands, M. Vesterinen
Summary: This paper studies the role of multi-parton interactions in the production of doubly-heavy hadrons using simulation samples and comparisons with different generators. New methods of speeding up simulations and experimental measurement suggestions are proposed.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Nuclear
M. E. Chaves, D. R. Gratieri, O. L. G. Peres
Summary: The authors utilize perturbation theory to calculate neutrino oscillation probabilities including both standard mass-mixing and non-standard neutrino interactions (NSI). The resulting formulas are compact and apply to a wide range of parameter space. They also explain the origin of degeneracies in neutrino probabilities and analytically determine combinations of parameters that result in identical oscillation probabilities to the standard oscillation case.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
K. Nobleson, Amna Ali, Sarmistha Banik
Summary: In this study, we investigate the structure and properties of neutron stars in R-2 gravity using both perturbative and non-perturbative methods. By considering various equations of state, we find that the mass-radius relation remains within the observational limit for a range of values of the extra degree of freedom parameter in modified gravity. We compare the results obtained from the two methods and identify the best suited method for studying modified gravity using astrophysical observations.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Xiaohuang Hu, Jialun Ping
Summary: This study extends the successful research on hidden-charm pentaquark states in the S = 0 system to the S = -1 system and discovers a new hidden-charm pentaquark state, P-cs (4459). These findings are expected to be further verified in future experiments.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Chemistry, Physical
Yilong Lin, Yecheng Zhou, Sheng Huang, Min Xiao, Dongmei Han, Jiaxiang Qin, Shuanjin Wang, Yuezhong Meng
Summary: Addressing the lithium polysulfide shuttle is crucial for high-energy-density lithium-sulfur batteries. In this study, LiPO2F2 is successfully demonstrated as a homogeneous catalyst in the electrolyte, mitigating the diffusion of polysulfides and improving the stability and capacity retention of the battery, while achieving high energy density.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Srimukh Prasad Veccham, Joonho Lee, Yuezhi Mao, Paul R. Horn, Martin Head-Gordon
Summary: In this study, EDA based on ALMOs was used to decompose the CT interaction energy into pairwise additive terms using density functional theory. The results provide new insights into the origin of trends in donor-acceptor interactions by capturing dominant CT orbitals and applying the method to different systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Florent Moutier, Jana Schiller, Constance Lecourt, Ali Moustafa Khalil, Vincent Delmas, Guillaume Calvez, Karine Costuas, Christophe Lescop
Summary: A new highly solid-state luminescent phase with high geometrical versatility and altered luminescent properties has been reported. The alterations in luminescent properties are associated with the geometrical changes. This assembly has potential as stimuli-sensitive luminescent materials.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Astronomy & Astrophysics
X. G. Wang, A. W. Thomas, R. D. Young
Article
Astronomy & Astrophysics
X. G. Wang, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, A. W. Thomas, P. Wang
Article
Physics, Nuclear
X. G. Wang, A. W. Thomas
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2020)
Article
Physics, Multidisciplinary
X. G. Wang, A. W. Thomas, W. Melnitchouk
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Nuclear
X. G. Wang, W. Bentz, I. C. Cloet, A. W. Thomas
Summary: We investigate the gluonic structure of nuclei and find considerable nuclear modifications of the gluon distributions in nuclear matter.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Shiryo Owa, A. W. Thomas, X. G. Wang
Summary: In this study, the pressure and shear distributions in the proton are calculated using a model with confined quarks supplemented by the pion field required by chiral symmetry. The incorporation of the pion contributions explains the long-range distributions, which are in agreement with experimentally extracted quark contributions. The results of the model are also compared with lattice QCD results at unphysically large quark mass.
Article
Physics, Nuclear
Xuan-Gong Wang, A. W. Thomas
Summary: We analyze the impact of a dark photon on the rare kaon decay K-L -> pi(0) nu(nu) over bar. The couplings between the dark photon and standard model particles are derived explicitly in terms of the dark photon mass and mixing parameter. We find that the dark photon correction to the standard model branching ratio Br(K-L -> pi(0) nu(nu) over bar) is no more than a few percent in the relevant region.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Wanli Xing, Xuan-Gong Wang, Anthony W. Thomas
Summary: Recent experimental studies suggest that short-range correlations may be a major contributor to the nuclear EMC effect, and this correlation leads to the suppression of the nucleon structure function and elastic form factors.
Article
Physics, Particles & Fields
N. T. Hunt-Smith, W. Melnitchouk, N. Sato, A. W. Thomas, X. G. Wang, M. J. White
Summary: In this study, we performed a global QCD analysis of high energy scattering data using the JAM Monte Carlo framework. We introduced a coupling to a dark photon and investigated its potential role in deep-inelastic scattering. The results show that the dark photon significantly improves the fit compared to the Standard Model, even after considering higher order uncertainties. The improvement is observed across a wide range of parameters and is particularly significant for fixed target and HERA DIS data. Additionally, the best fit value of g - 2 is reduced, reducing the disagreement with the latest experimental determination.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
A. W. Thomas, X. G. Wang
Summary: This study presents an analysis of experimental data on parity violating electron scattering and atomic parity violation, taking into account the effects of a dark photon. The results indicate that the presence of a heavy dark photon can explain the experimental data and alleviate the tension between predictions and observations.
Article
Astronomy & Astrophysics
Fangcheng He, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, A. W. Thomas, P. Wang, X. G. Wang
Summary: The helicity-dependent strange quark distribution in the proton, As, is calculated in a nonlocal chiral SU(3) effective field theory. The polarized strange quark distribution is found to be quite small.
Article
Astronomy & Astrophysics
A. W. Thomas, X. G. Wang, A. G. Williams
Summary: We investigate constraints on the dark photon arising from deep inelastic scattering data. By extracting parton distribution functions and considering the variations of the dark photon mixing parameter and mass, as well as the effects of vector-meson dominance, exclusion limits on the kinetic mixing parameter of the dark photon are inferred.
Article
Astronomy & Astrophysics
X. G. Wang, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, A. W. Thomas, P. Wang
Article
Astronomy & Astrophysics
Y. Salamu, Chueng-Ryong Ji, W. Melnitchouk, A. W. Thomas, P. Wang, X. G. Wang
Article
Astronomy & Astrophysics
X. G. Wang, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, A. W. Thomas, P. Wang
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
