CHIRAL CORRECTIONS TO THE AXIAL CHARGES OF THE OCTET BARYONS FROM QUENCHED QCD - ART. NO. 074509

Using quenched chiral perturbation theory, we calculate one-loop corre ctions to the axial charges of the octet baryons in the quenched appro ximation to quantum chromodynamics. The results are used to compare ch iral corrections to the axial charges in full QCD chiral perturbation theory with those in quenched QCD. We find that the quenched chiral pe rturbation theory result Q)+c(l2)(Q)m(pi)(2))lnm(pi)(2)+c(2)(Q)m(pi)(2 )+... is singular in the chiral limit unlike the regular behavior of t he full QCD chiral perturbation theory result c(0)+c(l2)m(pi)(2)lnm(pi )(2)+.... [S0556-2821(98)07517-1].