期刊
EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-019-7474-0
关键词
-
资金
- Fonds de la Recherche Scientifique - FNRS, Belgium [4.4503.19]
We study a few of the lowest states of the pentaquark uudcc over bar of positive and negative parity, in a constituent quark model with an SU(4) flavor-spin hyperfine interaction. For positive parity we introduce space wave functions of appropriate permutation symmetry with one unit of orbital angular momentum in the internal motion of the four-quark subsystem or an orbital excitation between the antiquark and the four quark subsystem which remains in the ground state. We show that the lowest positive parity states 1/2+,3/2+ are provided by the first alternative and are located below the 1/2- and the 1/2+ end{document} states with all quarks in the ground state. We compare our results with the LHCb three narrow pentaquark structures reported in 2019.
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