Baryon vector and axial-vector currents in the 1/N_c expansion

Details Baryon vector and axial-vector currents in the 1/N_c expansion Baryon vector and axial-vector currents in the 1/N_c expansion

2005-01-25

arxiv.org/abs/hep-ph/0501231v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, no figures. Based on a talk given at ECT Workshop on Large N_c QCD 2004, Trento, Italy, 5-9 Jul 2004

Scientific paper

The derivation of the 1/N_c expansions for the baryon vector and axial-vector currents, in the SU(3) symmetry limit and including perturbative SU(3) breaking, is reviewed. Symmetry breaking effects in the hyperon semileptonic decay form factors are reanalyzed. Fits to experimental data yield corrections to the leading vector and axial-vector form factors consistent with expectations. The values of the Cabibbo-Kobayashi-Maskawa matrix elements V_{ud} and V_{us} also extracted from the analysis are comparable to the ones recommended by the Particle Data Group.

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