Spin-parities of the P-c(4440) and P-c(4457) in the one-boson-exchange model

doi:10.1103/PhysRevD.103.054004

	Spin-parities of the P-c(4440) and P-c(4457) in the one-boson-exchange model
	Liu, Ming-Zhu 2,3; Wu, Tian-Wei 3; Sanchez, Mario Sanchez 8; Valderrama, Manuel Pavon 3,6,7; Geng, Li-Sheng 3,4,6,7; Xie, Ju-Jun 1,4,5
刊名	PHYSICAL REVIEW D
	2021-03-02
卷号	103 期号:5 页码:24
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.054004
通讯作者	Liu, Ming-Zhu()
英文摘要	The LHCb collaboration has recently observed three pentaquark peaks, the P-c(4312), P-c(4440) and P-c(4457). They are very close to a pair of heavy baryon-meson thresholds, with the P-c(4312) located 8.9 MeV below the (D) over bar Sigma(c) threshold, and the P-c(4440) and P-c(4457) located 21.8 and 4.8 MeV below the (D) over barSigma(c) one. The spin-parities of these three states have not been measured yet. In this work we assume that the P-c(4312) is a J(P) = 1/2- (D) over bar Sigma(c) bound state, while the P-c(4440) and P-c(4457) are (D) over barSigma(c) bound states of unknown spin-parity, where we notice that the consistent description of the three pentaquarks in the one-boson-exchange model can indeed determine the spin and parities of the later, i.e., of the two (D) over bar*Sigma(c) molecular candidates. For this determination we revisit first the one-boson-exchange model, which in its original formulation contains a short-range deltalike contribution in the spin-spin component of the potential. We argue that it is better to remove these deltalike contributions because, in this way, the one-boson-exchange potential will comply with the naive expectation that the form factors should not have a significant impact in the long-range part of the potential (in particular the one-pion-exchange part). Once this is done, we find that it is possible to consistently describe the three pentaquarks, to the point that the P-c(4440) and P-c(4457) can be predicted from the P-c(4312) within a couple of MeV with respect to their experimental location. In addition the so-constructed one-boson-exchange model predicts the preferred quantum numbers of the P-c(4440) and P-c(4457) molecular pentaquarks to be 3/2- and 1/2-, respectively.
资助项目	National Natural Science Foundation of China[11735003] ; National Natural Science Foundation of China[11975041] ; National Natural Science Foundation of China[11961141004] ; National Natural Science Foundation of China[11961141012] ; fundamental Research Funds for the Central Universities ; Youth Innovation Promotion Association CAS[2016367] ; Thousand Talents Plan for Young Professionals
WOS关键词	HEAVY ; CHARMONIUM ; SYMMETRY ; MESONS ; STATES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000627571800002
资助机构	National Natural Science Foundation of China ; fundamental Research Funds for the Central Universities ; Youth Innovation Promotion Association CAS ; Thousand Talents Plan for Young Professionals
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137691]
专题	中国科学院近代物理研究所
通讯作者	Liu, Ming-Zhu
作者单位	1.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 101408, Peoples R China 2.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China 3.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 4.Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China 5.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 6.Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China 7.Beihang Univ, Int Res Ctr Nuclei & Particles Cosmos, Beijing 100191, Peoples R China 8.Univ Bordeaux, Ctr Etud Nucl, CNRS, IN2P3, F-33175 Gradignan, France
推荐引用方式 GB/T 7714	Liu, Ming-Zhu,Wu, Tian-Wei,Sanchez, Mario Sanchez,et al. Spin-parities of the P-c(4440) and P-c(4457) in the one-boson-exchange model[J]. PHYSICAL REVIEW D,2021,103(5):24.
APA	Liu, Ming-Zhu,Wu, Tian-Wei,Sanchez, Mario Sanchez,Valderrama, Manuel Pavon,Geng, Li-Sheng,&Xie, Ju-Jun.(2021).Spin-parities of the P-c(4440) and P-c(4457) in the one-boson-exchange model.PHYSICAL REVIEW D,103(5),24.
MLA	Liu, Ming-Zhu,et al."Spin-parities of the P-c(4440) and P-c(4457) in the one-boson-exchange model".PHYSICAL REVIEW D 103.5(2021):24.