Molecular nature of P-cs (4459) and its heavy quark spin partners

doi:10.1103/PhysRevD.103.054016

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	Molecular nature of P-cs (4459) and its heavy quark spin partners
	Xiao, C. W.; Wu, J. J.; Zou, B. S.
刊名	PHYSICAL REVIEW D
	2021
卷号	103 期号:5 页码:54016
关键词	HIDDEN-CHARM PENTAQUARK DECAYS STATES MESON
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.054016
英文摘要	Inspired by the observation of the P-cs(4459) state by LHCb recently, we reexamine the results of the interaction of the J/y/A channel with its coupled channels, exploiting the coupled channel unitary approach combined with heavy quark spin and local hidden gauge symmetries. By tuning the only free parameter, we find a pole of (4459.07 + i6.89) MeV below the (D) over barXi(c) threshold, which was consistent with the mass and width of the P-cs(4459) state. Thus, we assume the P-cs(4459) state to be a (D) over barXi(c) bound state with the possible degeneracy of J(P) =1/2- and J(P) =3/2- According to this degeneracy, it would have a two-pole structure, like P-cs (4450) before. There is another pole in the J(P) = 1/2- sector, (4310.53 + i8.23) MeV, corresponding to a deep bound state of (D) over barXi(c) . Furthermore, the previously predicted loosely bound states (D) over bar Xi'(c) (D) over barXi'(c), (D) over barXi(c) with J = 1/2, I = 0 and (D) over bar Xi'(c,) (D) over barXi(c), (D) over barXi(c)* with J = 3/2, I = 0 may exist as either bound states or unbound virtual states. We hope that future experiments can search for the (D) over bar()Xi(c) molecular states not only in their dominant decay channels (D) over bar (s)()Lambda(c), but also in the channels J/psi/Lambda and eta(c)Lambda in order to reveal their different natures.
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/311006/27400]
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.[Xiao, C. W. 2.Zou, B. S.] Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China 3.[Wu, J. J. 4.Zou, B. S.] Univ Chinese Acad Sci UCAS, Sch Phys Sci, Beijing 100049, Peoples R China 5.[Zou, B. S.] Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xiao, C. W.,Wu, J. J.,Zou, B. S.. Molecular nature of P-cs (4459) and its heavy quark spin partners[J]. PHYSICAL REVIEW D,2021,103(5):54016.
APA	Xiao, C. W.,Wu, J. J.,&Zou, B. S..(2021).Molecular nature of P-cs (4459) and its heavy quark spin partners.PHYSICAL REVIEW D,103(5),54016.
MLA	Xiao, C. W.,et al."Molecular nature of P-cs (4459) and its heavy quark spin partners".PHYSICAL REVIEW D 103.5(2021):54016.