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"Negative Parity Baryon Decays in the 1/Nc Expansion"
C.P. Jayalath, J.L. Goity and N.N. Scoccola
Proc. of the "XIII International Conference on Hadron Spectroscopy" (HADRON 2009), Florida State University, Tallahassee, Florida, USA, November 29-December 4, 2009. Ed. V. Crede, P. Eugenio and A. Ostrovidov
AIP Conf. Proc., Vol.1257 (2010) 548-552
The 1/Nc expansion of QCD provides a useful framework for phenomenological studies of both ground state and excited baryons. Here, we focus on its application to the excited baryon strong decays via emission of single pseudoscalar meson. The S- and D-wave decay amplitudes of the negative parity baryons in the [70,1-] of SU(6) are analyzed to subleading order in 1/Nc and to first order in SU(3) symmetry breaking. In particular, the SU(3) symmetry breaking is studied in detail through SU(3) breaking decay operators and state mixing.
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