Cutoff effects in twisted mass lattice QCD
Abstract
We present a first numerical study of lattice QCD with O(a) improved Wilson quarks and a chirally twisted mass term. Renormalized correlation functions are derived from the Schroedinger functional and evaluated in an intermediate space-time volume of size 0.75^3 x 1.5 fm^4. In the quenched approximation precise results are then obtained with a moderate computational effort, allowing for a detailed study of the continuum approach. The latter is discussed in terms of observables which converge to meson masses and decay constants in the limit of large space-time volume. In the O(a) improved theory we find residual cutoff effects to be at the level of a few percent for lattice spacings of about 0.1 fm.
Cite
@article{arxiv.hep-lat/0108019,
title = {Cutoff effects in twisted mass lattice QCD},
author = {M. Della Morte and R. Frezzotti and J. Heitger and S. Sint},
journal= {arXiv preprint arXiv:hep-lat/0108019},
year = {2010}
}
Comments
20 pages, 5 figures. Comments about the uncertainties on improvement coefficients added