Suppression of PiNN(1535) Coupling in the QCD Sum Rule
High Energy Physics - Phenomenology
2008-02-03 v2 Nuclear Theory
Abstract
The \pi NN^* and \eta NN^* coupling constants are studied based on the two point functions between the vacuum and a one meson state in the soft meson limit. In terms of a suitably constructed interpolating field for the nucleon and resonances, we have found that the \pi NN^* couplings vanish, while \eta NN^* couplings remain finite. This result explains a relatively suppressed coupling of \pi NN(1535) as compared with others. We compare the present result with predictions of low energy effective models.
Keywords
Cite
@article{arxiv.hep-ph/9610520,
title = {Suppression of PiNN(1535) Coupling in the QCD Sum Rule},
author = {D. Jido and M. Oka and A. Hosaka},
journal= {arXiv preprint arXiv:hep-ph/9610520},
year = {2008}
}
Comments
6 pp, LaTeX