Possible interpretation of the newly observed

被引:0
|
作者
Xiao, Li-Ye [1 ]
Wang, Kai-Lei [2 ]
Liu, Ming-Sheng [3 ,4 ,5 ]
Zhong, Xian-Hui [3 ,4 ,5 ]
机构
[1] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China
[2] Changzhi Univ, Dept Elect Informat & Phys, Changzhi 046011, Shanxi, Peoples R China
[3] Hunan Normal Univ, Dept Phys, Changsha, Peoples R China
[4] Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha, Peoples R China
[5] Hunan Normal Univ, SICQEA, Changsha 410081, Peoples R China
来源
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 03期
基金
中国国家自然科学基金;
关键词
HEAVY BARYONS; NUCLEONS;
D O I
10.1140/epjc/s10052-020-7823-z
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Inspired by the newly observed b states by the LHCb Collaboration, we investigate the two-body strong decays of the low-lying.-mode b baryons up to N = 2 shell using the chiral quark model within the j - j coupling scheme. Our results indicate that: (i) the newly observed states b(6316)- and b(6330)- are good candidates of the light spin j = 1 states, while the spin-parity J P = 1/2and J P = 3/2- cannot be distinguished. The other two states, b(6340) and b(6350) mostly correspond to the light spin j = 2 states, while the spin-parity J P = 3/2- and J P = 5/2- cannot be distinguished as well. (ii) The 2S states with spin-parity J P = 1/2+ and J P = 3/2+, respectively, might be narrow states with a width of < 2 MeV. (iii) The 1D states are not broad and the total decay widths vary from several to dozens of MeV, which have a good potential to be observed in future experiments.
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页数:9
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