Analytic Approximations for the Extrapolation of Lattice Data

Abstract

We present analytic approximations of chiral SU(3) amplitudes for the extrapolation of lattice data to the physical masses and the determination of Next-to-Next-to-Leading-Order low-energy constants. Lattice data for the ratio F_K/F_pi is used to test the approximation proposed.

Comments: 6 pages, 1 figure. Talk given at QCD@Work2010: International Workshop on QCD - Theory and Experiment, Martina Franca, Valle d'Itria, Italy, 20-23 Jun 2010