Renormalization of chiral perturbation theory to order p(6)

The renormalization of chiral perturbation theory is carried out to next-to -next-to-leading order in the meson sector. We calculate the divergent part of the generating functional of Green functions of quark currents to O(p(6 )) for chiral SU(n), involving one- and two-loop diagrams. The renormalizat ion group equations for the renormalized low-energy constants of O(p(6)) ar e derived. We compare our results with previous two-loop calculations in ch iral perturbation theory. (C) 2000 Academic Press.