Semileptonic decays of the light J(P)=1/2(+) ground state baryon octet
  We calculate the semileptonic baryon octet-octet transition form factors using a manifestly Lorentz covariant quark model approach based on the factorization of the contribution of valence quarks and chiral effects. We perform a detailed analysis of SU(3) breaking corrections to the hyperon semileptonic decay form factors. We present complete results on decay rates and asymmetry parameters including lepton mass effects for the rates. 
Amand Faessler, Thomas Gutsche, Barry R. Holstein, Mikhail A. Ivanov,   Jurgen G. Korner, Valery E. Lyubovitskij