Coupled-channel effects of the Sigma((*))(c)(D)over-bar((*)) - Lambda(c)(2595)(D)over-bar over line system and molecular nature of the P-c pentaquark states from one-boson exchange model

doi:10.1103/PhysRevD.104.094039

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	*Coupled-channel effects of the Sigma(())(c)(D)over-bar(()) - Lambda(c)(2595)(D)over-bar over line system and molecular nature of the P-c pentaquark states from one-boson exchange model*
	Yalikun, Nijiati ; Lin, Yong-Hui ; Guo, Feng-Kun ; Kamiya, Yuki ; Zou, Bing-Song
刊名	PHYSICAL REVIEW D
	2021
卷号	104 期号:9 页码:94039
关键词	HIDDEN-CHARM PENTAQUARK BARYONS MESON DECAYS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.104.094039
英文摘要	The effects of the E-c(D) over bar* - Lambda(c)(2595)(D) over bar over bar coupled-channel dynamics and various one-boson-exchange (OBE) forces for the LHCb pentaquark states, P-c(4440) and P-c(4457), are reinvestigated. Both the pion and rho-meson exchanges are considered for the E-c(D) over bar-Lambda(c)(2595)(D) over bar over bar coupled-channel dynamics. It is found that the role of the Lambda(c)(2595)(D) over bar over bar channel in the descriptions of the P-c(4440) and P-c(4457) states is not significant with the OBE parameters constrained by other experimental sources. The naive OBE models with the short-distance delta((r) over right arrow) term of the one-pion exchange (OPE) keep failing to reproduce the P-c(4440) and P-c(4457) states simultaneously. The OPE potential with the full delta((r) over right arrow) term results in a too large mass splitting for the J(P) = 1/2(-) and 3/2(-) E-c(D) over bar bound states with total isospin I = 1=2. The OBE model with only the OPE delta((r) over right arrow) term dropped may fit the splitting much better but somewhat underestimates the splitting. Since the delta((r) over right arrow) potential is from short-distance physics, which also contains contributions from the exchange of mesons heavier than those considered explicitly, we vary the strength of the delta((r) over right arrow) potential and find that the masses of the P-c(4312), P-c(4440), and P-c(4457) can be reproduced simultaneously with the delta((r) over right arrow) term in the OBE model reduced by about 80%. While two different spin assignments are possible to produce their masses, in the preferred description, the spin parities of the P-c(4440) and P-c(4457) are 3/2(-) and 1/2(-), respectively.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27605]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany 2.[Yalikun, Nijiati 3.Guo, Feng-Kun 4.Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China 5.Kamiya, Yuki 6.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 7.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 8.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
推荐引用方式 GB/T 7714	Yalikun, Nijiati,Lin, Yong-Hui,Guo, Feng-Kun,et al. Coupled-channel effects of the Sigma(())(c)(D)over-bar(()) - Lambda(c)(2595)(D)over-bar over line system and molecular nature of the P-c pentaquark states from one-boson exchange model[J]. PHYSICAL REVIEW D,2021,104(9):94039.
APA	Yalikun, Nijiati,Lin, Yong-Hui,Guo, Feng-Kun,Kamiya, Yuki,&Zou, Bing-Song.(2021).Coupled-channel effects of the Sigma(())(c)(D)over-bar(()) - Lambda(c)(2595)(D)over-bar over line system and molecular nature of the P-c pentaquark states from one-boson exchange model.PHYSICAL REVIEW D,104(9),94039.
MLA	Yalikun, Nijiati,et al."Coupled-channel effects of the Sigma(())(c)(D)over-bar(()) - Lambda(c)(2595)(D)over-bar over line system and molecular nature of the P-c pentaquark states from one-boson exchange model".PHYSICAL REVIEW D 104.9(2021):94039.