Suppression of PiNN* Coupling and Chiral Symmetry

Details Suppression of PiNN* Coupling and Chiral Symmetry Suppression of PiNN* Coupling and Chiral Symmetry

1997-07-10

arxiv.org/abs/hep-ph/9707307v1

Phys.Rev.Lett. 80 (1998) 448-451

Physics

High Energy Physics

High Energy Physics - Phenomenology

7pp, LaTeX

Scientific paper

10.1103/PhysRevLett.80.448

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.

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