%0 Journal Article
%T Effective Chiral Lagrangians and Lattice QCD
%A Jochen Heitger
%A Rainer Sommer
%A Hartmut Wittig
%J Physics
%D 2000
%I arXiv
%R 10.1016/S0550-3213(00)00490-9
%X We propose a general method to obtain accurate estimates for some of the "low-energy constants" in the one-loop effective chiral Lagrangian by means of simulating lattice QCD. In particular, the method is sensitive to those constants whose values are required to test the hypothesis of a massless up-quark. Initial tests performed in the quenched approximation confirm that good statistical precision can be achieved. As a byproduct we obtain an accurate estimate for the ratio of pseudoscalar decay constants, F_K/F_pi, in the quenched approximation, which lies 10% below the experimental result. The quantities that serve to extract the low-energy constants also allow a test of the scaling behaviour of different discretizations of QCD and a search for the effects of dynamical quarks.
%U http://arxiv.org/abs/hep-lat/0006026v2