Eta-prime quark-antiquark and eta-prime NN vertex suppression in effective theories

Details Eta-prime quark-antiquark and eta-prime NN vertex suppression in effective theories Eta-prime quark-antiquark and eta-prime NN vertex suppression in effective theories

1998-08-03

arxiv.org/abs/hep-ph/9808210v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pages, 2 encapsulated postscript figures, latex2e uses svjour.cls, graphics, epsfig, amsmath; shortend version

Scientific paper

In an effective theory containing only quark degrees of freedom, such as the extended Nambu-Jona-Lasinio model, the influence of the axial anomaly can be incorporated by a self-interaction of the 't Hooft determinant type. I will show that despite the theshold problem related to the eta-prime meson this leads to a significant suppression of the eta-prime coupling g_{\eta' q \bar{q}} to dynamical quarks which suggests a suppression of the eta-prime-NN vertex as compared to the eta-NN vertex.

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