Strong decays of $N^{*}(1535)$ in an extended chiral quark model

Details Strong decays of $N^{*}(1535)$ in an extended chiral quark model Strong decays of $N^{*}(1535)$ in an extended chiral quark model

2009-10-23

arxiv.org/abs/0910.4452v1

Sci.Sin.G52:1452-1457,2009; Sci. China G52:1452-1457,2009

Physics

Nuclear Physics

Nuclear Theory

6 pages, 1 figure

Scientific paper

10.1007/s11433-009-0199-6

The strong decays of the $N^{*}(1535)$ resonance are investigated in an extended chiral quark model by including the low-lying $qqqq\bar{q}$ components in addition to the $qqq$ component. The results show that these five-quark components in $N^{*}(1535)$ contribute significantly to the $N^{*}(1535)\to N\pi$ and $N^{*}(1535)\to N\eta$ decays. The contributions to the $N\eta$ decay come from both the lowest energy and the next-to-lowest energy five-quarks components, while the contributions to the $N\pi$ decay come from only the latter one. Taking these contributions into account, the description for the strong decays of $N^{*}(1535)$ is improved, especially, for the puzzling large ratio of the decays to $N\eta$ and $N\pi$.

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