On the strong coupling $N^{(*)}N^{(*)}π$

K. Azizi; Y. Sarac; H. Sundu

doi:10.1140/epja/i2016-16114-2

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arXiv · 1510.05432

On the strong coupling $N^{()}N^{()}π$

K. Azizi·Y. Sarac·H. Sundu

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Abstract

We study the strong vertices $N^*Nπ$, $N^*N^*π$ and $NNπ$ in QCD, where $N^*$ denotes the negative parity $N (1535)$ state. We use the most general form of the interpolating currents to calculate the corresponding strong coupling constants. It is obtained that the coupling associated to $N^*Nπ$ vertex is strongly suppressed compared to those related to two other vertices. The strong coupling corresponding to $N^*N^*π$ is obtained to be roughly half of that of $NNπ$ vertex. We compare the obtained results on $N^*Nπ$ and $NNπ$ vertices with the existing predictions of other theoretical studies as well as those extracted from the experimental data.

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K. Azizi, Y. Sarac, H. Sundu. 2016-02-22. On the strong coupling $N^{(*)}N^{(*)}π$. https://doi.org/10.1140/epja%2Fi2016-16114-2

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