Pentaquark states with the $$QQQq\bar{q}$$ QQQqq¯ configuration in a simple model
Autor: | Li, Shi-Yuan, Liu, Yan-Rui, Liu, Yu-Nan, Si, Zong-Guo, Wu, Jing |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: | |
Zdroj: | European Physical Journal C: Particles and Fields, Vol 79, Iss 1, Pp 1-19 (2019) European Physical Journal |
ISSN: | 1434-6052 1434-6044 |
Popis: | We discuss the mass splittings for the S-wave triply heavy pentaquark states with the $$QQQq\bar{q}$$ QQQqq¯ $$(Q=b,c;q=u,d,s)$$ (Q=b,c;q=u,d,s) configuration which is a mirror structure of $$Q\bar{Q}qqq$$ QQ¯qqq . The latter configuration is related with the nature of $$P_c(4380)$$ Pc(4380) observed by the LHCb Collaboration. The considered pentaquark masses are estimated with a simple method. One finds that such states are probably not narrow even if they do exist. This leaves room for molecule interpretation for a state around the low-lying threshold of a doubly heavy baryon and a heavy-light meson, e.g. $$\Xi _{cc}D$$ ΞccD , if it were observed. As a by product, we conjecture that upper limits for the masses of the conventional triply heavy baryons can be determined by the masses of the conventional doubly heavy baryons. |
Databáze: | OpenAIRE |
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