Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457) | |
Wang, Xiao-Yun1; He, Jun2,3; Chen, Xu-Rong4; Wang, Quanjin5; Zhu, Xinmei6 | |
刊名 | PHYSICS LETTERS B |
2019-10-10 | |
卷号 | 797 |
ISSN号 | 0370-2693 |
DOI | 10.1016/j.physletb.2019.134862 |
英文摘要 | The production of the hidden-charm pentaquarks via a pion-induced reaction on a proton target is investigated within an effective Lagrangian approach. Three experimentally observed states, P-c(4312), P-c(4440), and P-c(4457), are considered in calculation, and the Reggeized t-channel meson exchange is considered as main background for the reaction pi(-)p -> J/psi n. The numerical results show that the experimental data of the total cross section at W similar or equal to 5 GeV can be well explained by the contribution from the Reggeized t channel with reasonable cutoff. If the branching ratios Br[P-c -> J/psi N] similar or equal to 3% and Br[P-c -> pi N] similar or equal to 0.05% are taken, the average value of the cross section from the P-c(4312) is about 1.2 nb/100 MeV, which is consistent with existing rude data at near-threshold energies. The results indicate that the branching ratios of the P-c state decays into J/psi N and pi N should be small. The differential cross section shows a sharp increase at extreme forward angles due to the Reggeized t-channel contribution while the contributions from the P-c states are relatively flat. High-precision experimental measurement on the reaction pi(-)p -> J/psi n at near-threshold energies is suggested to confirm the LHCb hidden-charm pentaquarks as genuine states, and such measurement is also helpful to understand the origins of these resonance structures. (C) 2019 The Authors. Published by Elsevier B.V. |
资助项目 | Natural Science Foundation of Gansu Provinceunder[17JR5RA113] |
WOS研究方向 | Astronomy & Astrophysics ; Physics |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000488071200054 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.223/handle/2XXMBERH/31511] |
专题 | 理学院 兰州理工大学 外国语学院 |
通讯作者 | He, Jun |
作者单位 | 1.Lanzhou Univ Technol, Dept Phys, Lanzhou 730050, Gansu, Peoples R China 2.Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China 3.Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210097, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 5.Lanzhou Univ Technol, Lanzhou 730050, Gansu, Peoples R China 6.Yangzhou Univ, Dept Phys, Yangzhou 225009, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Xiao-Yun,He, Jun,Chen, Xu-Rong,et al. Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457)[J]. PHYSICS LETTERS B,2019,797. |
APA | Wang, Xiao-Yun,He, Jun,Chen, Xu-Rong,Wang, Quanjin,&Zhu, Xinmei.(2019).Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457).PHYSICS LETTERS B,797. |
MLA | Wang, Xiao-Yun,et al."Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457)".PHYSICS LETTERS B 797(2019). |
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