CORRECTIONS TO CHIRAL DYNAMICS OF HEAVY HADRONS - SU(3) SYMMETRY-BREAKING

In previous publications we have analyzed the strong and electromagnet ic decays of heavy mesons and heavy baryons in a formalism which incor porates heavy-quark and chiral symmetries. There are two possible symm etry-breaking effects on the chiral dynamics of heavy hadrons: the fin ite-mass effects from light quarks and the 1/m(Q) corrections from hea vy quarks. In the present paper, chiral-symmetry-breaking effects are studied and applications to various strong and radiative decays of hea vy hadrons are illustrated. SU(3) violations induced by chiral loops i n the radiative decays of charmed mesons and charmed baryons are compa red with those predicted by the constituent quark model. In particular , available data for D decays favor values of the parameters in chira l perturbation theory which give predictions for D decays close to th e quark model results except for the D(s)+. Implications are discusse d.