Twisted mass chiral perturbation theory for 2+1+1 quark flavours
High Energy Physics - Lattice
2011-05-09 v2 High Energy Physics - Phenomenology
Abstract
We present results for the masses of pseudoscalar mesons in twisted mass lattice QCD with a degenerate doublet of u and d quarks and a non-degenerate doublet of s and c quarks in the framework of next-to-leading order chiral perturbation theory, including lattice effects up to O(a^2). The masses depend on the two twist angles for the light and heavy sectors. For maximal twist in both sectors, O(a)-improvement is explicitly exhibited. The mixing of flavour-neutral mesons is also discussed, and results in the literature for the case of degenerate s and c quarks are corrected.
Keywords
Cite
@article{arxiv.1103.1494,
title = {Twisted mass chiral perturbation theory for 2+1+1 quark flavours},
author = {Gernot Münster and Tobias Sudmann},
journal= {arXiv preprint arXiv:1103.1494},
year = {2011}
}
Comments
LaTeX2e, 12 pages, corrected typos