Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725929 | Physics Letters B | 2008 | 6 Pages |
Abstract
We study the photoproduction helicity amplitudes of negative parity baryons in the context of the 1/Nc 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/Nc power counting. They also show significant deviations from the quark model, in particular the need for 2-body effects.
Related Topics
Physical Sciences and Engineering
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Authors
N.N. Scoccola, J.L. Goity, N. Matagne,