arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.07101hep-ph
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具有SU(4)味旋超精细相互作用的$uudc \bar c$隐魅五夸克态的能谱

Spectrum of the $uudc \bar c$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction

Fl. Stancu

摘要:

在SU(4)味旋超精细相互作用的组分夸克模型中,研究了正宇称和负宇称五夸克$uudc\overline{c}$的几个最低态.对于正宇称,我们引入空间波函数适当的置换对称性与一个单位的轨道角动量的内部运动的四夸克子系统或轨道之间的激发反夸克和四夸克子系统,它仍然在基态。我们发现,最低的正宇称态$1/2^+, 3/2^+$是由第一种选择提供的,并位于下面的$1/2^-$和$1/2^+$态与所有的夸克在基态。我们将我们的结果与2019年报道的LHCb三窄五夸克结构进行了比较。

英文摘要:

We study a few of the lowest states of the pentaquark $uudc\overline{c}$, 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 $1/2^+$ states with all quarks in the ground state. We compare our results with the LHCb three narrow pentaquark structures reported in 2019.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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