1998/05/31 by Ruben Flores-Mendieta, Rubén Flores-Mendieta, Elizabeth Jenkins +1 · 11 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.58.094028
published as Phys.Rev.D58:094028,1998 · 18 pages (revtex). Discussion of theory errors added. Two redundant parameters for symmetry breaking in f1 deleted. Central values for the fits remain unchanged, but some of the errors are modified
arxiv created 1998/07/09 · openalex publication_date 1998/10/05 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Flavor SU(3) symmetry breaking in hyperon semileptonic decay form factors is analyzed using the 1/Nc expansion. A detailed comparison with experimental data shows that corrections to f1 are approximately 10%, which agrees with theoretical expectations. Corrections to g1 are compatible with first-order symmetry breaking. A fit to the experimental data allows one to predict the g1 form factor for \ensuremathΞ0\ensuremath→\ensuremathΣ+ decay. The proton matrix element of the T8 component of the axial vector current [which is equal to 3F\ensuremath-D in the SU(3) symmetry limit] is found to be \ensuremath≈0.34--0.46.