Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457)

doi:10.1016/j.physletb.2019.134862

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	Pion-induced production of hidden-charm pentaquarks P-c(4312), P-c(4440), and P-c(4457)
	Wang, Xiao-Yun 1; He, Jun 2,3; Chen, Xu-Rong 4; Wang, Quanjin 5; Zhu, Xinmei 6
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).