Twisted mass chiral perturbation theory for 2+1+1 quark flavours

Details Twisted mass chiral perturbation theory for 2+1+1 quark flavours Twisted mass chiral perturbation theory for 2+1+1 quark flavours

2011-03-08

arxiv.org/abs/1103.1494v2

JHEP 1104:116,2011

Physics

High Energy Physics

High Energy Physics - Lattice

LaTeX2e, 12 pages, corrected typos

Scientific paper

10.1007/JHEP04(2011)116

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.

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