arXiv:hep-lat/0511036·v3·High Energy Physics — Lattice
Nf=2 Lattice QCD and Chiral Perturbation Theory
L. Scorzato · F. Farchioni · P. Hofmann · K. Jansen · I. Montvay · G. Munster · M. Papinutto · E. E. Scholz · A. Shindler · N. Ukita · C. Urbach · U. Wenger · I. Wetzorke
Abstract
By employing a twisted mass term, we compare recent results from lattice calculations of Nf=2 dynamical Wilson fermions with Wilson Chiral Perturbation Theory (WChPT). The final goal is to determine some combinations of Gasser-Leutwyler Low Energy Constants (LECs). A wide set of data with different lattice spacings (a ~ 0.2-0.12 fm), different gauge actions (Wilson plaquette, DBW2) and different quark masses (down to the lowest pion mass allowed by lattice artifacts and including negative quark masses) provide a strong check of the applicability of WChPT in this regime and the scaling behaviours in the continuum limit.
Comments: 8 pages. To appear in proceedings of Computational Hadron Physics, Nicosia, 14-17 Sep 2005. Notation made uniform with other publications