Understanding the newly observed Ξc0 states through their decays

被引：22
作者：
Wang, Kai-Lei [1 ]
Xiao, Li-Ye [2 ,3 ,4 ]
Zhong, Xian-Hui [3 ,4 ,5 ]
机构：
[1] Changzhi Univ, Dept Elect Informat & Phys, Changzhi 046011, Shanxi, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China
[3] Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China
[4] Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China
[5] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat S, Changsha 410081, Peoples R China
来源：
PHYSICAL REVIEW D | 2020年 / 102卷 / 03期
基金：
中国国家自然科学基金;
关键词：
HEAVY BARYONS; PHOTOPRODUCTION; NUCLEONS; MASSES;
D O I：
10.1103/PhysRevD.102.034029
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Inspired by the newly observed Xi(0)(c) states by the LHCb Collaboration, we investigate the OKubo-Zweig-lizuka-allowed two-body strong decays of the lambda-mode 1P wave Xi'(c) states within the chiral quark model. Our results indicate that: (i) The newly observed states Xi(c) (2923)(0) and Xi(c) (2939)(0) are good candidates of the lambda-mode 1P wave Xi'c states with the spin-parity J(P) = 3/2(-), namely vertical bar(4)P(lambda)3/2(-)> and vertical bar P-2(lambda) 3/2(-)>, respectively. (ii) The other newly observed state Xi(c) (2965)(0) mostly corresponds to the lambda-mode 1P-wave Xi'(c) state with the spin-parity J(P) = 5/2(-), namely vertical bar(4)P(lambda)5/2(-)>. (iii) For the two lambda-mode J(P) = 1/2(-) mixed states, the vertical bar P(lambda)1/2(-)>(1) is a narrow state with a width of Gamma similar to 15 MeV and mainly decays into Xi'(c)pi, while the vertical bar P(lambda)1/2(-)>(2) state has a width of Gamma similar to 52 MeV and dominantly decays into Xi(c)pi and Lambda K-c channels. If the broad structure around 2880 MeV observed at LHCb arises from the new Xi(0)(c) state, this state is very likely to be the vertical bar P(lambda)1/2(-)>(2) state.
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页数：8
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