ChPT description of the pion mass and decay constant from N_f=2 twisted mass QCD

Abstract

We study lattice QCD determinations of the pion mass and decay constant by means of chiral perturbation theory (ChPT). The lattice data are obtained from large scale simulations with N_f=2 flavours of twisted mass fermions at maximal twist. We perform a scaling test to the continuum limit of these data and use ChPT to perform both the chiral and the infinite volume extrapolations.

Comments: 8 pages, 4 figures, presented at International Workshop on Effective Field Theories: From the Pion to the Upsilon (EFT 09), Valencia, Spain, 2-6 Feb 2009