Article
Astronomy & Astrophysics
Qi-Nan Wang, Zi-Yan Yang, Wei Chen, Hua-Xing Chen
Summary: The mass spectra of tetraquark states with different spin-parity quantum numbers were studied, showing that positive parity ground states have lower masses than negative parity channels. Positive parity tetraquarks are predicted to be stable and narrow due to decaying only via weak interaction below the BcBc threshold.
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
Feng-Xiao Liu, Ming-Sheng Liu, Xian-Hui Zhong, Qiang Zhao
Summary: In this study, 36 tetraquark configurations were constructed for the tetraquark ss (s) over bar(s) over bar system, and the mass spectrum was predicted using a nonrelativistic potential quark model without the diquark-antidiquark approximation. The resonances f(0)(2200), f(2)(2340), and the newly observed X(2500) were identified as potential candidates for specific tetraquark states, providing guidance for experimental searches. The study also predicted the mass range for certain T-ss (s) over bar(s) over bar states, indicating the likelihood of observing these states in experiments.
Article
Physics, Particles & Fields
Bo-Cheng Yang, Liang Tang, Cong-Feng Qiao
Summary: Researchers identified distinct structures in the J/Psi-pair mass spectrum as different masses of tetraquark states using QCD sum rules. The octet-octet tetraquark states were found to have masses around 6.44-6.96 GeV, with corresponding fully-bottom partners around 18.38-18.59 GeV.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Halil Mutuk
Summary: This article introduces the dynamical diquark model, which proposes that exotic hadrons can be formed from colored diquarks. Using numerical calculations and approximation methods, the mass spectra of S-wave cc (b) over bar(b) over bar, bc (c) over bar(c) over bar, and bc (b) over bar(b) over bar tetraquark systems are studied, with one of the systems identified as a candidate for a bound state.
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
Physics, Nuclear
Zi-Yan Yang, Wei Chen
Summary: In this study, we investigate the mass spectra of D-wave excited cs (c) over bar(s) over bar tetraquark states with J(PC) = 1(++) and 1(+-) using the QCD sum rule method. Our results suggest that the recently observed X(4685) resonance can be interpreted as a D-wave cs (c) over bar(s) over bar tetraquark state with J(PC) = 1(++) in the (2,0(0,0}) or (0,2{2,0}) excitation mode. We also provide mass relations for the positive and negative C-parity D-wave cs (c) over bar(s) over bar tetraquarks, which can be useful for searching for these potential tetraquark states in various channels.
Article
Astronomy & Astrophysics
Rafal Maciula, Antoni Szczurek
Summary: We discuss the impact of the new LHCb fixed-target p + 4He data on the cc over bar component in the nucleon wave function. We find that the traditional mechanisms calculated in the kT-factorization approach are not sufficient to describe the transverse momentum and rapidity distributions of D0= over bar D0 mesons. We also consider the contribution from the intrinsic cc over bar component and set limits on its probability.
Article
Astronomy & Astrophysics
Yuheng Wu, Xin Jin, Runxin Liu, Xinmei Zhu, Hongxia Huang, Jialun Ping
Summary: In this study, we explore the double-charm and double-strange tetraquark states with two structures within the framework of the quark delocalization color screening model. We find two new resonance states by applying a stabilization calculation and coupling all channels, with mass and width around 4250 and 6 MeV, and 4300 and 19 MeV, respectively. These states are more likely to be compact resonance states. Although no significant signals were observed in the present experiment, further testing with a larger amount of data is suggested.
Article
Physics, Nuclear
S. S. Agaev, K. Azizi, B. Barsbay, H. Sundu
Summary: In this study, the semileptonic and nonleptonic decays of the double-beauty axial-vector tetraquark T-bb are investigated using the QCD sum rule method. The spectroscopic parameters of the final-state tetraquark are calculated, and the partial widths of the dominant decays are computed in terms of weak form factors. The predictions obtained for the partial widths of the decays are used to improve the theoretical accuracy of the full width and lifetime of the tetraquark T-bb, which are crucial for experimental exploration.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
Rohit Tiwari, D. P. Rathaud, Ajay Kumar Rai
Summary: In this article, a non-relativistic potential model is utilized to calculate the mass-spectra of bottom and heavy-light bottom tetraquark states. The four-body problem is simplified into a two-body problem using a diquark-antidiquark approximation, and the Schrodinger equation is solved numerically with a Cornell-inspired potential and relativistic correction term. Various spin-dependent terms are used to describe the splitting structure of the tetraquark spectrum. The calculated masses of bottom mesons, diquarks, and tetraquarks fall within specific energy ranges, and the Z(b)(10610) and Z(b)(10650) states are found to be below certain thresholds in the current model.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
Tao Guo, Jianing Li, Jiaxing Zhao, Lianyi He
Summary: In the improved chromomagnetic interaction model, we conducted a systematic study on S-wave tetraquark states with different quantum numbers. We predicted the mass spectra of these states and analyzed their possible decay channels considering angular momentum and C-parity conservation. Our model successfully explains the recently observed hidden-charm tetraquark states with strangeness. Furthermore, we found that the low-lying states of each configuration have a large overlap to the meson basis, indicating future experiments can search for these states via Q (Q) over bar and q (q) over bar mesons.
Article
Astronomy & Astrophysics
Zi-Yan Yang, Qi-Nan Wang, Wei Chen, Hua-Xing Chen
Summary: This study investigates the existence of fully-heavy hidden-flavor bc(b) over bar(c) over bar tetraquark states with various J(PC) values, and shows that these states may be stable under certain conditions. The analysis suggests that both S-wave positive parity and P-wave negative parity tetraquark states exhibit specific mass ranges and potential decay channels.
Article
Astronomy & Astrophysics
Pedro Bicudo, Antje Peters, Sebastian Velten, Marc Wagner
Summary: This study used lattice QCD to investigate a tetraquark particle and found that at short distances, the diquark-antidiquark structure dominates, while at larger distances, it is mostly a meson-meson state. The estimated meson-meson to diquark-antidiquark ratio of this tetraquark is around 60%/40%.
Article
Physics, Particles & Fields
Yuan Li, Ying-Bo He, Xiao-Hai Liu, Baoyi Chen, Hong-Wei Ke
Summary: In this study, we propose to search for the exotic doubly charmed meson T-cc(+) and its analog T-cc (s) over bar(+) in B-c(+) decays, which provide a favorable environment for the formation of the exotic state containing double charm quarks. Through various rescattering processes with different intermediate states, the production of T-cc(+) and T-cc (s) over bar(+) is investigated. The estimated branching ratios of B-c(+) decaying into T-cc(+) (D) over bar (0), T-cc(+) (D) over bar*(0), T-cc (s) over bar (D) over bar (0), and T-cc (s) over bar (D) over bar*(0) are on the order of 10(-7), 10(-5), 10(-6), and 10(-4), respectively, which can be tested in future experiments.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Agronomy
Zhen-Zhen Li, Fei Deng, Chi Zhang, Li Zhu, Lian-Hua He, Tao Zhou, Hui Lu, Shi-Lin Zhu, Yu-Ling Zeng, Xiao-Yuan Zhong, Wei Zhou, Yong Chen, Wan-Jun Ren, Jian-Feng Hu
Summary: A simple and low-cost index, called relative culm wall thickness (RCWT), is proposed to evaluate the lodging resistance of rice. Through a field experiment, RCWT was found to be significantly correlated with various lodging-related indexes. Rice plants with high RCWT were characterized by lower plant height and center of gravity, as well as shorter basal internodes, thicker culm wall thickness, and smaller pith diameter. These features increased the fullness of the stem, resulting in higher cellulose and lignin content, enhanced bending resistance, and decreased lodging index.
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Yuhua Fu, Hong Liu, Jingwen Dou, Yue Wang, Yong Liao, Xin Huang, Zhenshuang Tang, JingYa Xu, Dong Yin, Shilin Zhu, Yangfan Liu, Xiong Shen, Hengyi Liu, Jiaqi Liu, Xin Yang, Yi Zhang, Yue Xiang, Jingjin Li, Zhuqing Zheng, Yunxia Zhao, Yunlong Ma, Haiyan Wang, Xiaoyong Du, Shengsong Xie, Xuewen Xu, Haohao Zhang, Lilin Yin, Mengjin Zhu, Mei Yu, Xinyun Li, Xiaolei Liu, Shuhong Zhao
Summary: IAnimal is a cross-species, multi-omics knowledgebase that aims to improve the utilization of multi-omics data and simplify data integration for better understanding of gene regulation mechanisms and comprehensive analyses of biological systems.
NUCLEIC ACIDS RESEARCH
(2023)
Review
Environmental Sciences
Tong Wu, Shan-Shan Yang, Le Zhong, Ji-Wei Pang, Luyan Zhang, Xue-Fen Xia, Fan Yang, Guo-Jun Xie, Bing-Feng Liu, Nan-Qi Ren, Jie Ding
Summary: This paper provides a comprehensive review of studies on simultaneous nitrogen and phosphorus removal. The most promising process is found to be simultaneous nitrification, denitrification, and phosphorus removal (SNDPR). Factors influencing SNDPR are analyzed and future research directions are suggested, including balancing microbial competition, achieving continuous flow operation, and maximizing phosphorus recovery.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Cell & Tissue Engineering
Xin Mao, Zhehui Wang
Summary: Cardiovascular disease is a major threat to human life and health, and heart transplantation is the most effective treatment. However, the shortage of living heart organs has always been an issue. With the development of bioprinting technology, 3D bioprinted hearts have become a promising solution, and research in this field has become a hot topic.
TISSUE ENGINEERING AND REGENERATIVE MEDICINE
(2023)
Article
Physics, Particles & Fields
Zhi Yang, Guang-Juan Wang, Jia-Jun Wu, Makoto Oka, Shi-Lin Zhu
Summary: In this study, we investigated the near-threshold P-wave B-s states using the Hamiltonian effective field theory, combining the quark model, the quark-pair-creation mechanism and B-(*)(K) over bar interaction. By fitting the lattice data and applying the heavy quark flavor symmetry, we determined all the parameters in the D-s sector. The predicted masses of the bottom-strange partners of the D-30*(2317) and D-31*(2460) are consistent with lattice QCD simulation. We also observed a crossing point in the finite volume spectrum, which corresponds to a CDD zero in the B(K) over bar scattering T-matrix, providing further insights into the near-threshold states.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Proceedings Paper
Physics, Particles & Fields
Bo Wang, Lu Meng, Shi-Lin Zhu
Summary: In this study, we investigated di-hadron interactions including D (D) over bar*/D*(D) over bar, D*(D) over bar, DsD*/D*D-s, BB*/BB* and B*B* in chiral effective field theory (chi EFT) up to next-to-leading (NLO) order. The tetraquark states Z(c)(3900), Z(c)(4020), Z(cs)(3985), Z(b)(10610), Z(b)(10650) above threshold can be explained as corresponding di-hadron resonances. We also studied the interactions of Sigma(()(c)*) (D) over bar(*) to investigate the three hidden-charm pentaquarks Pc(4312), Pc(4440) and Pc(4457). Using the parameters fixed from the Pc states, we predicted possible molecular states in Xi D-c* Xi cD* and Xi & lowast; c recently observed by the LHCb Collaboration. Our predictions of the Xi D-c(*) bound states are in good agreement with two new near-threshold structures.
NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS
(2023)
Article
Astronomy & Astrophysics
Yao Ma, Lu Meng, Yan-Ke Chen, Shi-Lin Zhu
Summary: In this article, we use a systematic diffusion Monte Carlo (DMC) calculation to study the ground state baryons under two confinement scenarios. We demonstrate a feasible procedure to investigate few-quark states with possible confinement mechanisms, which can be extended to multiquark states easily. Our results show that both pairwise and three-body confinement mechanisms can describe the experimental data well if the parameters are chosen properly. We also obtain the real ground state of the ccc over bar c over bar system starting from diquark-antidiquark spin-color channels alone.
Article
Astronomy & Astrophysics
Niu Su, Wei-Han Tan, Hua-Xing Chen, Wei Chen, Shi-Lin Zhu
Summary: The QCD sum rule method was used to study double-gluon hybrid states with quark-gluon contents q over bar qgg (q 1/4 u=d) and s over bar sgg. Twenty-eight double-gluon hybrid currents were constructed, with eleven of them found to be zero due to internal symmetries between the two gluon fields. The masses of nonvanishing currents with exotic quantum numbers JPC 1/4 1- thorn and 3- thorn were calculated to be Mjq over bar qgg;1- thorn i 1/4 4.35 thorn 0.26 and Mjs over bar sgg;3- thorn i 1/4 3.16 thorn 0.22-0.28 GeV. The decay behaviors of JPC 1/4 3- thorn states were studied, and their search in the xa1o1260 thorn =pco=00 channels in future particle experiments is proposed.
Article
Astronomy & Astrophysics
Niu Su, Hua-Xing Chen, Wei Chen, Shi-Lin Zhu
Summary: We investigate the double-gluon hybrid states composed of quark-gluon contents q over bar qgg (q = u/d) and s over bar sgg. Twelve double-gluon hybrid currents with various quantum numbers are constructed, and five of them are found to be zero due to some internal symmetries. The remaining seven currents are used for QCD sum rule analyses. In particular, the masses of the double-gluon hybrid states with exotic quantum number JPC = 2+- are calculated to be Mlq over bar qgg;2+-) = 2.26+0.20 -0.25 GeV and Mls over bar sgg;2+-) = 2.38+0.19 -0.25 GeV. Their two-and three-meson decay patterns are also studied.
Article
Astronomy & Astrophysics
Jian-Bo Cheng, Du-xin Zheng, Zi-Yang Lin, Shi-Lin Zhu
Summary: We investigate the double-charm and hidden-charm hexaquarks as molecular states using the one-boson-exchange potential model. We consider multichannel coupling and S-D wave mixing and use the complex scaling method to study quasibound states. We find a quasibound state in the double-charm system, but not in the hidden-charm system.
Article
Physics, Particles & Fields
Bo-Lin Huang, Zi-Yang Lin, Kan Chen, Shi-Lin Zhu
Summary: We calculate the complete T matrices of elastic light pseudoscalar meson and heavy meson scattering to the third order in heavy meson chiral perturbation theory. We determine the low-energy constants by fitting the phase shifts and scattering lengths from lattice QCD simulations simultaneously, and predict the phase shifts at the physical meson masses. The strong phase shifts in various channels suggest the presence of bound states or resonances, including the well-known exotic state D-s0*(2317).
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Lu Meng, Bo Wang, Shi-Lin Zhu
Summary: The LHCb Collaboration has recently observed the first hidden-charm pentaquark with strangeness, P?,yso4338 thorn 0. The state is close to the Xi 0c over bar D0 and Xi thorn c D- thresholds, raising concerns about the bias of the Breit-Wigner parametrization and its coupling to these double thresholds. Through qualitative and formalism-based analyses, it is shown that the peak of P?,yso4338 thorn 0 could originate from either an o-; thorn thorn sheet pole above the Xi thorn c D- threshold or an o-; - thorn sheet pole below the Xi 0c over bar D0 threshold. The authors suggest a refined experimental analysis considering unitarity and analyticity.