Article
Astronomy & Astrophysics
M. R. Robilotta
Summary: This study explores the application of SU(2) and SU(3) unitary matrices in chiral descriptions, providing analytic representations and revealing their intrinsic relationships and properties through mathematical derivations and symbolic calculations.
Article
Physics, Multidisciplinary
Hao-Ze Tong, Hao-Song Li
Summary: In this study, the masses of the doubly bottom baryons and charmed-bottom baryons are investigated up to O(p(3)) in heavy baryon chiral perturbation theory. The unknown low energy constants in the quark model and lattice QCD are determined. The numerical results for the masses of these baryons are presented up to O(p(3)).
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Astronomy & Astrophysics
Ho-Yeon Won, June-Young Kim, Hyun-Chul Kim
Summary: The study investigates the gravitational form factors of the baryon octet within the framework of the SU(3) chiral quark-soliton model, considering the effects of flavor SU(3) symmetry breaking. The research shows that heavier baryons are energetically more compact than lighter ones. The effects of flavor SU(3) symmetry breaking differently contribute to the angular momentum distributions for the octet baryons, with spin and orbital angular momentum contributing almost equally.
Article
Astronomy & Astrophysics
P. M. Copeland, Chueng-Ryong Ji, W. Melnitchouk
Summary: The study computes the self-energies of flavor SU(3) octet and decuplet baryons within a relativistic chiral effective theory framework, deriving the leading nonanalytic chiral behavior for the masses. A finite-range regularization consistent with Lorentz and gauge invariance is applied, and the relative importance of various meson-baryon loop contributions to the self-energies is numerically studied. A comparison is made between relativistic results and earlier approximations within the heavy baryon limit.
Article
Astronomy & Astrophysics
Gunnar S. Bali, Sara Collins, Wolfgang Soeldner, Simon Weishaeupl
Summary: In this study, we accurately calculated the low energy constants of the SU(3) chiral perturbation theory from lattice QCD and extrapolated these constants to the chiral, infinite volume, and continuum limits. We found that the SU(3) chiral condensate and F0 are smaller than their SU(2) counterparts, while the Gell-Mann-Oakes-Renner parameters B0 are approximately equal to B.
Article
Astronomy & Astrophysics
Jung-Min Suh, Yu-Son Jun, Hyun-Chul Kim
Summary: We investigate the axial-vector transition form factors of the baryon octet to the baryon decuplet within the framework of the chiral quark-soliton model, including the effects of flavor SU(3) symmetry breaking. Our results are compared with those from other models and lattice QCD, and are found to be in good agreement with the T2K data. We also extract the value of the axial-vector mass from the data.
Article
Astronomy & Astrophysics
Luiz L. Lopes, Kauan D. Marquez, Debora P. Menezes
Summary: In this paper, we calculate the baryon-meson coupling constants for the spin-1/2 baryonic octet and spin-3/2 decuplet based on symmetry arguments. By fixing the coupling constants of the baryon with the scalar sigma meson to reproduce the known potential depths for hyperons and Delta resonances, we can apply them to study neutron star matter with hyperons and deltas admixed. It is concluded that the presence of the Delta- particle is the most important and always present in neutron stars, affecting their astrophysical properties and potentially contributing to an increase in the maximum mass reached.
Article
Astronomy & Astrophysics
Sourendu Gupta, Jajati K. Nayak, Sushant K. Singh
Summary: Using linear response theory, the thermalization of an ensemble of the octet of pseudoscalar mesons was investigated at a temperature of 150 MeV, with a relaxation time of around 100 fm and rapid increase with temperature. The long relaxation times are directly linked to the fact that these mesons are pseudo-Goldstone bosons of chiral symmetry breaking.
Article
Astronomy & Astrophysics
Axel Brandenburg, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Jennifer Schober
Summary: In this study, we investigate the evolution of magnetic fields coupled with chiral fermion asymmetry in the framework of chiral magnetohydrodynamics. We examine the effects of different initial conditions on the magnetic field and chiral chemical potential, and their implications for baryogenesis in the universe.
Article
Astronomy & Astrophysics
Yong-Jiang Xu, Yong-Lu Liu, Chun-Yu Cui, Ming-Qiu Huang
Summary: This paper constructs interpolating currents J((+/-)mu)(x) with J(P) = 1(+) and applies the QCD sum rule method to calculate the mass, magnetic moment, and decay modes of Z(cs)(3985). The numerical values obtained are in agreement with experimental data, providing insights into the inner structure of Z(cs)(3985).
Article
Chemistry, Multidisciplinary
Jeffrey A. Brock, Michael D. Kitcher, Pierre Vallobra, Rajasekhar Medapalli, Maxwell P. Li, Marc De Graef, Grant A. Riley, Hans T. Nembach, Stephane Mangin, Vincent Sokalski, Eric E. Fullerton
Summary: A new effect is discovered where domains expand unidirectionally in response to a combination of out-of-plane and in-plane magnetic fields, with the growth direction controlled by the in-plane field strength. The authors theoretically demonstrate that perpendicular field torques stabilize steady-state magnetization profiles highly asymmetric in elastic energy, resulting in a dynamic symmetry breaking consistent with experimental findings.
ADVANCED MATERIALS
(2021)
Article
Astronomy & Astrophysics
Jung -Min Suh, June -Young Kim, Ghil-Seok Yang, Hyun-Chul Kim
Summary: We investigate the quark spin content of the SU(3) baryon octet, decuplet, antitriplet, and sextet by considering the rotational corrections and symmetry breaking effects. The results are compared with various theoretical works and lattice QCD.
Article
Astronomy & Astrophysics
Bo-Lin Huang, Jian-Bo Cheng, Shi-Lin Zhu
Summary: In this study, the complete T matrices of elastic nucleon-nucleon scattering were calculated up to third order in SU(3) heavy baryon chiral perturbation theory. The results are consistent with empirical data and SU(2) heavy baryon chiral perturbation theory, indicating that the interaction predicted in SU(3) theory leads to reasonable predictions. The errors from low-energy constants were also analyzed in detail.
Article
Astronomy & Astrophysics
A. Feijoo, V. Valcarce Cadenas, V. K. Magas
Summary: We have used extended Unitarized Chiral Perturbation Theory to study the meson-baryon interaction in the neutral S = -2 sector. Our approach incorporates not only the leading Weinberg-Tomozawa term, as in previous studies, but also the Born terms and next-to-leading order contribution. By employing the SU(3) symmetry of the chiral Lagrangian, we have taken most of the model parameters from the BCN model and fit them to experimental data in the neutral S = -1 sector. Our results demonstrate the ability of our approach to dynamically generate Xi(1620) and Xi(1690) states in reasonable agreement with the data, and provide a natural explanation for the puzzle with the decay branching ratios of Xi(1690). This highlights the reliability of chiral models with unitarization in coupled channels and the importance of considering Born and NLO contributions for precise calculations.
Article
Physics, Multidisciplinary
Harleen Dahiya, Suneel Dutt, Arvind Kumar, Monika Randhawa
Summary: The axial-vector charges of light and charmed baryons are investigated in the SU(4) chiral constituent quark model, considering contributions from u (u) over bar, d (d) over bar, s (s) over bar, and c (c) over bar fluctuations. The dependence of these charges on Q(2) is studied using the dipole form of parametrization. The baryons considered are the spin 1/2 (+) and spin 3/2 (+) multiplets decomposed based on the charm content.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Nuclear
Zhi-Wei Liu, Kai-Wen Li, Li-Sheng Geng
Summary: We study baryon-baryon interactions with strangeness S = -2 using leading order covariant chiral effective field theory. We determine the relevant low energy constants by fitting to the latest HAL QCD simulations, considering all coupled channels. Comparing our calculations with experimental data for lambda lambda and (Σ0Λ)-p correlation functions, we find good agreement which demonstrates consistency between theory, experiment, and lattice QCD simulations. We also predict sigma(+)sigma, sigma(+)lambda, and sigma(+)sigma(-) interactions and their momentum correlation functions.
Review
Physics, Multidisciplinary
Evgueni Goudzovski, Diego Redigolo, Kohsaku Tobioka, Jure Zupan, Gonzalo Alonso-Alvarez, Daniele S. M. Alves, Saurabh Bansal, Martin Bauer, Joachim Brod, Veronika Chobanova, Giancarlo D'Ambrosio, Alakabha Datta, Avital Dery, Francesco Dettori, Bogdan A. Dobrescu, Babette Dobrich, Daniel Egana-Ugrinovic, Gilly Elor, Miguel Escudero, Marco Fabbrichesi, Bartosz Fornal, Patrick J. Fox, Emidio Gabrielli, Li-Sheng Geng, Vladimir V. Gligorov, Martin Gorbahn, Stefania Gori, Benjamin Grinstein, Yuval Grossman, Diego Guadagnoli, Samuel Homiller, Matheus Hostert, Kevin J. Kelly, Teppei Kitahara, Simon Knapen, Gordan Krnjaic, Andrzej Kupsc, Gaia Lanfranchi, Danny Marfatia, Jorge Martin Camalich, Diego Martinez Santos, Karim Massri, Patrick Meade, Matthew Moulson, Hajime Nanjo, Matthias Neubert, Maxim Pospelov, Sophie Renner, Stefan Schacht, Marvin Schnubel, Rui-Xiang Shi, Brian Shuve, Tommaso Spadaro, Yotam Soreq, Emmanuel Stamou, Olcyr Sumensari, Michele Tammaro, Jorge Terol-Calvo, Andrea Thamm, Yu-Chen Tung, Dayong Wang, Kei Yamamoto, Robert Ziegler
Summary: Rare meson decays are valuable tools for investigating both heavy and light new physics, with the use of kaons being particularly advantageous due to their small decay widths and large datasets. Hyperon decay measurements also provide complementary information. This article summarizes the relevant phenomenological models and current status of searches in both kaon and hyperon decay channels. It identifies new search strategies for unexplored signatures and highlights the potential for significant advances in exploring light dark sectors with improved sensitivities from current and future experiments.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Hao-Nan Wang, Li-Sheng Geng, Qian Wang, Ju-Jun Xie
Summary: We study the decays of B-0 -> (KX)-X-0 (3872) and B+ -> K+X(3872) using the X(3872) resonance coupled to the D (D) over bar* + c.c channel. Besides the short-distance interaction mechanism, we also consider the long-distance rescattering diagrams of D (D) over bar*. The difference in mass thresholds and the narrow width of X(3872) at the X(3872) mass lead to significant differences in the loop functions of D (D) over bar*(0) and D+ (D) over bar*-. Taking this into account, we naturally obtain a ratio of B[B-0 -> K-0 X(3872)]/B[B+ -> K+X (3872)] similar to 0.5. Based on this result, we evaluate the decay widths of B-s(0) -> eta(eta')X(3872). Future experimental measurements of these decays are expected to provide insight into the nature of the X(3872) resonance.
CHINESE PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Xuyang Ning, Abdusalam Abdukerim, Zihao Bo, Xiangyi Cui, Wei Chen, Xun Chen, Chen Cheng, Zhaokan Cheng, Yingjie Fan, Deqing Fang, Changbo Fu, Mengting Fu, Lisheng Geng, Karl Giboni, Linhui Gu, Xuyuan Guo, Chencheng Han, Ke Han, Changda He, Jinrong He, Di Huang, Yanlin Huang, Junting Huang, Zhou Huang, Ruquan Hou, Yu Hou, Xiangdong Ji, Yonglin Ju, Chenxiang Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Tao Li, Qing Lin, Jianglai Liu, Congcong Lu, Xiaoying Lu, Lingyin Luo, Yunyang Luo, Wenbo Ma, Yugang Ma, Yajun Mao, Yue Meng, Ningchun Qi, Zhicheng Qian, Xiangxiang Ren, Nasir Shaheed, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Lin Si, Wenliang Sun, Andi Tan, Yi Tao, Anqing Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Zhou Wang, Yuehuan Wei, Mengmeng Wu, Weihao Wu, Jingkai Xia, Mengjiao Xiao, Xiang Xiao, Pengwei Xie, Binbin Yan, Xiyu Yan, Jijun Yang, Yong Yang, Yukun Yao, Chunxu Yu, Ying Yuan, Zhe Yuan, Xinning Zeng, Dan Zhang, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Li Zhao, Qibin Zheng, Jifang Zhou, Ning Zhou, Xiaopeng Zhou, Yon Zhou, Yubo Zhou
Summary: This study reports a direct search for electromagnetic interactions between dark matter and xenon nuclei, resulting in constraints on the charge radius of dark matter and improved upper limits on other physical parameters. This has significant implications for understanding the properties of dark matter and exploring new physics.
Article
Physics, Multidisciplinary
Jun-Xu Lu, Li-Sheng Geng, Michael Doering, Maxim Mai
Summary: Chiral perturbation theory and its unitarized versions have been instrumental in our understanding of low-energy strong interaction. In this study, the first global analysis of meson-baryon scattering up to one-loop order is presented. The results demonstrate that covariant baryon chiral perturbation theory, including unitarization for the negative strangeness sector, can accurately describe meson-baryon scattering data. This validates the validity of this important low-energy effective field theory of QCD.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Xiao-Xu Dong, Rong An, Jun-Xu Lu, Li-Sheng Geng
Summary: In this study, a refined Bayesian neural network (BNN) based approach with six inputs, including proton number, mass number, and engineered features associated with various effects, is proposed to accurately describe nuclear charge radii. The new approach shows good performance in describing charge radii of atomic nuclei with A > 40 and Z > 20, with a standard root-mean-square deviation of 0.014 fm for the training and validation data. The predicted charge radii of proton-rich and neutron-rich calcium isotopes also agree well with the data, demonstrating the reliability of the BNN approach.
Editorial Material
Multidisciplinary Sciences
Rui-Xiang Shi, Li-Sheng Geng
Article
Physics, Multidisciplinary
Xuyang Ning, Abdusalam Abdukerin, Zihao Bo, Wei Chen, Xun Chen, Chen Cheng, Zhaokan Cheng, Xiangyi Cui, Yingjie Fan, Deqing Fang, Changbo Fu, Mengting Fu, Lisheng Geng, Karl Giboni, Linhui Gu, Xuyuan Guo, Chencheng Han, Ke Han, Changda He, Jinrong He, Di Huang, Yanlin Huang, Junting Huang, Zhou Huang, Ruquan Hou, Yu Hou, Xiangdong Ji, Yonglin Ju, Chenxiang Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Tao Li, Qing Lin, Jianglai Liu, Congcong Lu, Xiaoying Lu, Lingyin Luo, Yunyang Luo, Wenbo Ma, Yugang Ma, Yajun Mao, Yue Meng, Ningchun Qi, Zhicheng Qian, Xiangxiang Ren, Nasir Shaheed, Xiaofeng Shang, Xiyuan Shao, Guofang Shen, Lin Si, Wenliang Sun, Andi Tan, Yi Tao, Anqing Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Zhou Wang, Yuehuan Wei, Mengmeng Wu, Weihao Wu, Jingkai Xia, Mengjiao Xiao, Xiang Xiao, Pengwei Xie, Binbin Yan, Xiyu Yan, Jijun Yang, Yong Yang, Yukun Yao, Chunxu Yu, Ying Yuan, Zhe Yuan, Xinning Zeng, Dan Zhang, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhang, Li Zhao, Qibin Zheng, Jifang Zhou, Ning Zhou, Xiaopeng Zhou, Yong Zhou, Yubo Zhou, Liangliang Su
Summary: This study reports on a search for light dark matter through the cascading decay of η mesons produced by the collision of cosmic rays and Earth's atmosphere. A new framework is introduced to specifically address boosted dark matter, including a dedicated simulation of both elastic and quasielastic processes of Earth's attenuation effect on dark matter particles reaching the detector. No significant excess over background is observed in the PandaX-4T commissioning data with a 0.63 tonne · year exposure. The study also provides the first constraints on the interaction between light dark matter generated in the atmosphere and nuclei through a light scalar mediator.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Yang Xiao, Si-Zhe Xu, Ru-You Zheng, Xiang-Xiang Sun, Li-Sheng Geng, Shi-Sheng Zhang
Summary: One-proton radioactivity in 149Lu has been studied using the Wentzel-Kramers-Brillouin (WKB) approach and the proton-nucleus potential extracted from the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc). The results show that 149Lu is oblately deformed and the predicted half-life is consistent with experimental measurements. The study also checks the validity of the approach in describing other Lu isotopes and their isomeric states, with good agreement between predicted and experimental half-lives.
Article
Physics, Multidisciplinary
D. Sadasivan, M. Mai, M. Doring, Ulf-G. Meissner, F. Amorim, J. Klucik, Jun-Xu Lu, Li-Sheng Geng
Summary: By extending the coupled-channel S- and P-wave next-to-leading order chiral-unitary approach, we have successfully incorporated the new data from the KLOE and AMADEUS experiments as well as the Lambda pi mass distribution of the Sigma(1385) into the strangeness S = -1 meson-baryon scattering. We have calculated the positions of the poles on the second Riemann sheet corresponding to the S(1385) pole and the Lambda(1380) and Lambda(1405) poles, as well as the couplings of these states to various channels. The inclusion of KLOE and AMADEUS data has improved the average precision for determining resonance positions and branching ratios by about 20%.
FRONTIERS IN PHYSICS
(2023)
Article
Astronomy & Astrophysics
Jia-Ming Xie, Ming-Zhu Liu, Li-Sheng Geng
Summary: Motivated by the recent discovery of the charmonium X(3960) in B decays, the possible existence of two bound/virtual states below the D+s D-s and over bar DD mass thresholds has been reexamined. Using the effective Lagrangian approach and triangle diagrams, we calculate the production rates of B+ -> Xss over bar K+ and B+ -> Xqq over bar K+ in B decays. Our results show that the production yields are consistent with experimental data, suggesting that these bound states can be detected if they do exist.
Article
Astronomy & Astrophysics
Xin Zhu, Hao-Nan Wang, De-Min Li, En Wang, Li-Sheng Geng, Ju-Jun Xie
Summary: Recently, the BESIII Collaboration observed the scalar meson a0(1710)+ in the K+K0S invariant mass spectrum in the D+s -> pi 0K+K0S decay. They performed a theoretical study of a0(1710)+ in the process D+s -> pi 0a0(1710)+-> pi 0K+K0S and considered the contributions of K* and a0(980). The study supported the molecular K* over bar K* nature of the scalar a0(1710) resonance, as the recent BESIII experimental measurements can be well reproduced.
Article
Astronomy & Astrophysics
Tian-Chen Wu, Li-Sheng Geng
Summary: This study explores the production mechanism of charm-strange states D-s0*(2317) and D-s1(2460), and finds that the molecular model can well explain their production cross-section ratios. In addition, we predict the production yield of the three-body bound state D(D) over barK, and find that it is within the reach of the ongoing Belle II experiment.
Article
Astronomy & Astrophysics
J. W. Zhao, B. -H. Sun, I. Tanihata, S. Terashima, A. Prochazka, J. Y. Xu, L. H. Zhu, J. Meng, J. Su, K. Y. Zhang, L. S. Geng, L. C. He, C. Y. Liu, G. S. Li, C. G. Lu, W. J. Lin, W. P. Lin, Z. Liu, P. P. Ren, Z. Y. Sun, F. Wang, J. Wang, M. Wang, S. T. Wang, X. L. Wei, X. D. Xu, J. C. Zhang, M. X. Zhang, X. H. Zhang
Summary: The charge-changing cross sections (CCCS) of C11-15, N13-17, and O-15,O-17-18 on a carbon target at around 300 MeV/nucleon are presented, extending to p-shell isotopes with N<28.
Article
Astronomy & Astrophysics
Tian-Wei Wu, Ya-Wen Pan, Ming-Zhu Liu, Si-Qiang Luo, Li-Sheng Geng, Xiang Liu
Summary: The paper investigates the recently discovered doubly charmed exotic state T-cc and suggests that it could be a molecular state predicted in theoretical models. The study presents a potential DDD* state and its main decay modes.