Chiral Effective Lagrangian and Quark Masses

Abstract

The status of lattice determinations of quark masses is reviewed (with the exception of m_b). Attempts to extract the low-energy constants in the effective chiral Lagrangian are discussed, with special emphasis on those couplings which are required to test the hypothesis of a massless up-quark. Furthermore, the issue of quenched chiral logarithms is addressed.

Comments: Invited talk presented at Lattice2002(plenary), 12 pages, 3 figures