Suppression of PiNN* Coupling and Chiral Symmetry

Abstract

Meson-baryon couplings between positive and negative parity baryons are investigated using two point correlation functions in the soft meson limit. We find that the pi NN^* coupling vanishes due to chiral symmetry, while the eta NN^* coupling remains finite. We perform an analysis based on the algebraic method for SU(2) and SU(3) chiral symmetry, and find that baryon axial charges play an essential role for vanishing coupling constants.

7pp, LaTeX

References in corpus (1)

• Calculation of $g_{\pi N{S}_{11}}$ and $g_{\eta N{S}_{11}}$ Couplings in QCD Sum Rules

Cited by in corpus (22)

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