Photo-production of Positive Parity Excited Baryons in the 1/Nc Expansion of QCD

Details Photo-production of Positive Parity Excited Baryons in the 1/Nc Expansion of QCD Photo-production of Positive Parity Excited Baryons in the 1/Nc Expansion of QCD

2007-01-29

arxiv.org/abs/hep-ph/0701244v1

Phys.Rev.Lett.99:062002,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages

Scientific paper

10.1103/PhysRevLett.99.062002

We analyze the photo-production helicity amplitudes for the positive parity
excited baryons in the context of the $1/N_c$ expansion of QCD. The results
show that sub-leading corrections in $1/N_c$ are important and that, while
1-body effective operators are dominant, there is some evidence for the need of
2-body effects.

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