Article
Astronomy & Astrophysics
Stefan Meinel, Martin Pflaumer, Marc Wagner
Summary: In this study, lattice QCD is used to investigate the existence of stable antiheavy-antiheavy-light-light tetraquarks. Clear evidence for the existence of a strong-interaction-stable (b) over bar(b) over bar us tetraquark was found.
Article
Physics, Particles & Fields
Jing Hu, Bing-Ran He, Jia-Lun Ping
Summary: The properties of full-heavy tetraquarks cc(c) over bar(b) over bar and bb(b) over bar(c) over bar are systematically investigated in this study, considering the meson-meson structure, diquark-antidiquark structure, and K-structure. No bound state is found for the cc(c) over bar(b) over bar and bb(b) over bar(c) over bar systems in IJ(P)=00(+), 01(+), and 02(+) channels. However, three possible resonance states with energies of 10,079 MeV, 10,081 MeV, and 10,177 MeV are observed in the cc(c) over bar(b) over bar system in IJP=00(+), 01(+), and 02(+) channels, respectively, with decay widths Gamma of 6.7-8.4 MeV, 1.4-7.2 MeV, and 9.1-11.1 MeV. Similarly, the bb(b) over bar(c) over bar system also exhibits three possible resonance states with energies of 16,474 MeV, 16,474 MeV, and 16,541 MeV in IJP=00(+), 01(+), and 02(+) channels, respectively, with decay widths Gamma of 2.2-6.1 MeV, 2.2-6.9 MeV, and 5.3-8.5 MeV. The bc(c) over bar(c) over bar and cb(b) over bar(b) over bar systems yield the same results as the cc(c) over bar(b) over bar and bb(b) over bar(c) over bar systems, respectively. These full-heavy resonance states are worth searching for in future experiments.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Lu Meng, Guang-Juan Wang, Bo Wang, Shi-Lin Zhu
Summary: The study focuses on the characteristics of the doubly charmed tetraquark state T-cc(+), including binding energy, coupling constants, and various decay channels. The results indicate that the decay width of T-cc(+) -> (DD0)-D-0 pi(+) is the largest, suggesting this as the dominant experimental observation channel.
Article
Physics, Particles & Fields
Xuejie Liu, Hongxia Huang, Jialun Ping, Dianyong Chen, Xinmei Zhu
Summary: This study systematically investigates different structures and channel couplings of tetraquark systems, proposing hypotheses to explain exotic resonance states. Experimental tests are expected to verify these hypotheses.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
Xiaoyun Chen, Youchang Yang
Summary: This study explores bound states and low-lying resonance states of doubly-heavy tetraquark states cc (u) over bar(d) over bar (T-cc) and bb (u) over bar(d) over bar (T-bb) using a chiral quark model and accurate few-body method, Gaussian expansion method. The results reveal important findings regarding the binding energy and resonance states of these systems.
Article
Astronomy & Astrophysics
Ya-Wen Pan, Tian-Wei Wu, Ming-Zhu Liu, Li-Sheng Geng
Summary: This study investigates the properties of the (D) over bar(D) over bar*Sigma(c) three-body molecule by adding a (D) over bar meson into the (D) over bar*Sigma(c) pair. It finds the existence of two three-body bound states of (D) over bar*Sigma(c) and shows their correlation with the mass splitting of P-c(4440) and P-c(4457).
Article
Physics, Particles & Fields
Halil Mutuk
Summary: We study the S-wave mass spectra of flavor exotic triply-heavy tetraquark states cc (c) over bar(q) over bar, cc (b) over bar(q) over bar, bb (c) over bar(q) over bar, and bb (b) over bar(q) over bar. Using a diquark-antidiquark scheme, we solve the Schrodinger equation and make calculations in a nonrelativistic quark model with a color interaction described by a potential computed in AdS/QCD. Our findings show stable state candidates in the cc (c) over bar(q) over bar sector, while in the cc (b) over bar(q) over bar, bb (c) over bar(q) over bar, and bb bq sectors, all the states lie above corresponding S-wave meson-meson thresholds.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Xuejie Liu, Yue Tan, Dianyong Chen, Hongxia Huang, Jialun Ping
Summary: In this work, the states of triply heavy tetraquarks QQ Q over bar q over bar with all possible quantum numbers are investigated in the chiral quark model using the resonating ground method. Two different structures, meson-meson and diquark-antidiquark, are considered. The study shows that the coupled-channel effect is significant in the formation of stable tetraquark states.
Article
Physics, Particles & Fields
Xiang Wei, Qing-Hua Shen, Ju-Jun Xie
Summary: This theoretical study investigates the D (D) over barK three body system using the fixed center approximation and the chiral unitary approach. The study finds a resonance structure in the three body K-(D (D) over bar)(X(3720)) scattering amplitude, supporting the formation of a D (D) over barK bound state.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Sungsik Noh, Woosung Park, Su Houng Lee
Summary: The study improves the nonrelativistic quark model by introducing a complete set of three-dimensional harmonic oscillator bases and validates the method by comparing calculated binding energies with exact values for the hydrogen model. The new method is applied to analyze double heavy tetraquark states and calculate ground state masses, with certain states found to be stable against the two lowest threshold meson states. The study also discusses the spatial sizes of the tetraquarks.
Article
Astronomy & Astrophysics
Qi-Fang Lu, Dian-Yong Chen, Yu-Bing Dong, Elena Santopinto
Summary: In this study, an extended relativized quark model was used to investigate triply-heavy tetraquarks, which were found to be unstable and easily decay into heavy quarkonium plus heavy-light mesons. The mass spectra showed similar patterns, maintaining light flavor SU(3) symmetry and heavy quark symmetry well. These findings suggest that triply-heavy tetraquarks are potential candidates for future experimental investigations.
Article
Physics, Nuclear
Yu. A. Simonov
Summary: This paper discusses the phenomenon of the recently discovered narrow peak X(3875) in the D* D system by LHCb, as well as the absence of resonances in the DsDs and D*D-s*(s) systems. It is explained within an extended version of the Recoupling Model that the resonance is the result of infinite recoupling transitions of confining strings between quarks and antiquarks. The Recoupling Mechanism also allows for the calculation of the resonance Z(c)(3900) in the D (D) over bar* system with a larger width, which agrees with experimental data.
PHYSICS OF ATOMIC NUCLEI
(2023)
Review
Physics, Nuclear
Yubing Dong, Pengnian Shen, Zongye Zhang
Summary: This study provides a detailed analysis of the d*(2380) resonance, focusing on its quark-gluon degrees of freedom. Using the SU(3) chiral constituent quark model and Resonating Group Method, the mass, width, wave function, and partial widths of the d*(2380) state with the +C8C8 structure are evaluated. The obtained results are in good agreement with experimental data, suggesting that d*(2380) can be classified as a compact hexaquark system with a dominant hidden-color component. The electromagnetic characteristics of d* are also calculated and can be used to distinguish different structures of d*.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2023)
Article
Astronomy & Astrophysics
Xin-Zhen Weng, Xiao-Lin Chen, Wei-Zhen Deng, Shi-Lin Zhu
Summary: The study indicates that the energy level of the fully heavy tetraquark is mainly determined by color interaction favoring the color-sextet configuration. The chromomagnetic interaction mixes the color configurations and gives small splitting. Most states may be wide with at least one S-wave decay channel, while one possible narrow state is forbidden due to conservation laws.
Article
Astronomy & Astrophysics
Pablo G. Ortega, Jorge Segovia, Francisco Fernandez
Summary: The Z(b) (10610)(+/-) and Z(b) (10650)(+/-) are bottomoniumlike structures with puzzling charge properties, potentially involving four-quark systems. Coupled-channels calculations and line shape analysis suggest a molecular interpretation and provide description of their line shapes.
Article
Astronomy & Astrophysics
Zuqing Wu, Jialun Ping, Hongshi Zong
MODERN PHYSICS LETTERS A
(2017)
Article
Physics, Multidisciplinary
You-Chang Yang, Zhi-Yun Tan, Hong-Shi Zong, Jialun Ping
Article
Physics, Particles & Fields
Jin-Li Zhang, Zhu-Fang Cui, Jia-Lun Ping, Craig D. Roberts
Summary: The size and shape of GTMDs for pions are largely determined by the scale of emergent hadronic mass, and the hardness of their mass distribution form factor is found to be larger than the electromagnetic form factor, which is in turn harder than the gravitational pressure distribution form factor. The pressure in the vicinity of the pion's core is comparable to that at the center of a neutron star, and the shear pressure reaches its maximum when confinement forces dominate within the pion.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
Zu-Qing Wu, Jia-Lun Ping, Hong-Shi Zong
Summary: The self-consistent mean field approximation of the two-flavor NJL model was used to study the QCD phase structure, showing that contributions of the exchange channel need to be considered and a weighting factor needs to be chosen to match lattice results. The study revealed that the QCD phase transition temperature and critical points vary with different parameters under different conditions.
Article
Physics, Nuclear
Yue Tan, Jialun Ping
Summary: The study examined various four-quark candidates for X(2900) using Gaussian expansion method and real-scaling method, identifying five possible resonances originating in the cs (q) over bar(q) over bar system. R-0(2914) was suggested as a potential candidate for X-0(2900) based on experimental data. However, further research is needed to find resonances with similar widths for X-1(2900).
Article
Physics, Particles & Fields
Jin-Li Zhang, Jia-Lun Ping
Summary: The study investigates the Kaon generalized parton distributions (GPDs) and leading Fock state light-front wave functions in the Nambu-Jona-Lasinio model, comparing form factors, parton distribution functions, and various other results derived from these distributions. The analysis reveals specific physical properties of the quarks in the Kaon, including impact parameter distributions and light-front energy and charge radii. The research demonstrates consistent multi-dimensional mappings of the Kaon using different methods within the Nambu-Jona-Lasinio model.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
Bo-Lin Li, Yan Yang, Jia-Lun Ping
Summary: Researchers have constructed a new set of hybrid equations of state that describe the transition from low-density hadronic matter to high-density strange quark matter. By incorporating nonperturbative features of quantum chromodynamics, they found that the presence of strange quark matter makes the equation of state softer. The hybrid stars formed from this equation of state are more compact than neutron stars and have smaller tidal deformabilities.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Review
Multidisciplinary Sciences
Hongxia Huang, Chengrong Deng, Xuejie Liu, Yue Tan, Jialun Ping
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
Astronomy & Astrophysics
Jing Zhou, Xun Chen, Yan-Qing Zhao, Jialun Ping
Article
Multidisciplinary Sciences
Gang Yang, Jialun Ping, Jorge Segovia
Article
Physics, Nuclear
Hongxia Huang, Xinmei Zhu, Jialun Ping
Article
Astronomy & Astrophysics
Yue Tan, Jialun Ping
Article
Physics, Nuclear
Xuejie Liu, Hongxia Huang, Jialun Ping
