SU(3) SYMMETRY-BREAKING IN HYPERON SEMILEPTONIC DECAYS - ART. NO. 094028

Flavor SU(3) symmetry breaking in hyperon semileptonic decay form fact ors is analyzed using the 1/N-c expansion. A detailed comparison with experimental data shows that corrections to f(1) an approximately 10%, which agrees with theoretical expectations. Corrections to g(1) are c ompatible with first-order symmetry breaking. A fit to the experimenta l data allows one to predict the g(1) form factor for Xi(0)-->Sigma(+) decay. The proton matrix element of the Ts component of the axial vec tor current [which is equal to 3F-D in the SU(3) symmetry limit] is fo und to be approximate to 0.34-0.46. [S0556-2821(98)02421-7].