1998/04/16 by Carl E. Carlson, Christopher D. Carone · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.58.053005
published as Phys.Rev. D58 (1998) 053005 · 17 pages LaTeX, four EPS figures
arxiv created 1998/04/16 · openalex publication_date 1998/07/29 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider the electromagnetic decays of the orbitally excited SU(6) 70-plet baryons, to compare the predictions of the naive quark model with those of large-Nc QCD. The helicity amplitudes measured in N* photoproduction are computed in a large-Nc effective field theory, based on a Hartree approximation, and the amplitudes are fit to the current experimental data. Our results indicate that the success of the naive quark model predictions cannot be explained by large-Nc arguments alone. This is consistent with the conclusions of an earlier study of the N*\ensuremath→N\ensuremathπ decays that utilized the same approach.