Nonleptonic hyperon decays and lightlike chiral structure of hadrons

On the basis of the lightlike chiral structure of hadrons, we investigate the S- and P-wave nonleptonic decays of hyperons. Assuming that (i) the 1/2+ octet baryons transform as (6,3) under the chiral SUsub(l)(3)xSUsub(l)(3) and (ii) the weak Hamiltonian transforms as octet under either the left-handed or the right-handed SUsub(l)(3), we show that the equal x+-commutator terms satisfy the ΔI=1/2 rules and the L-S relation for the S-wave decays, and the ΔI=1/2 rule for the P-wave Σ-decays. (auth.)