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arXiv · 0711.4203

Analysis of Negative Parity Baryon Photoproduction Amplitudes in the $1/N_c$ Expansion

N. N. Scoccola·J. L. Goity·N. Matagne
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Abstract

We study the photoproduction helicity amplitudes of negative parity baryons in the context of the $1/N_c$ expansion of QCD. A complete analysis to next-to-leading order is carried out. The results show sub-leading effects to be within the magnitude expected from the $1/N_c$ power counting. They also show significant deviations from the quark model, in particular the need for 2-body effects.

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N. N. Scoccola, J. L. Goity, N. Matagne. 2007-11-27. Analysis of Negative Parity Baryon Photoproduction Amplitudes in the $1/N_c$ Expansion. https://doi.org/10.1016/j.physletb.2008.03.056

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