The $\pi NN$ and $\pi NN(1535)$ couplings in QCD

Shi-Lin Zhu, W. -Y. P. Hwang, Yuan-Ben Dai

The light cone QCD sum rules are derived for the $\pi NN$ coupling $g_{\pi NN}$ and $\pi NN(1535)$ coupling $g_{\pi N{N}^{\ast }}$. The contribution from the excited states and continuum is subtrac…