THE DMO SUM-RULE REVISITED

We reconsider the DMO sum rule in light of our recent two-loop calcula tions of isospin and hypercharge vector and axialvector current propag ators in chiral perturbation theory. A modified derivation valid to se cond order in the light quark masses is presented, and a phenomenologi cal analysis yields determination of a combination of finite counterte rms occurring in the p(4) and p(6) chiral lagrangians. Suggestions are given for further study. (C) 1997 Elsevier Science B.V.