The suppression of $πN N(1535)$ coupling in QCD

Details The suppression of $πN N(1535)$ coupling in QCD The suppression of $πN N(1535)$ coupling in QCD

1998-10-06

arxiv.org/abs/hep-ph/9810255v1

Mod.Phys.Lett. A13 (1998) 2763-2770

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure, submitted to Mod. Phys. Lett. A

Scientific paper

10.1142/S021773239800293X

The light cone QCD sum rules are employed to calculate the $\pi N N(1535)$ coupling $g_{\pi N N^\ast}$. We study the two point correlation function of two nucleon currents sandwiched between the vacuum and the pion state. The contribution from the excited states and the continuum is subtracted cleanly through double Borel transformation with respect to the nucleon and N(1535) momenta, $p_1^2$, $p_2^2=(p-q)^2$. Our calculation shows that the $\pi N N(1535)$ coupling is strongly suppressed.

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