Europhys. Lett.
Volume 68, Number 5, December 2004
Page(s) 639 - 644
Section The physics of elementary particles and fields
Published online 29 October 2004
Europhys. Lett., 68 (5), pp. 639-644 (2004)
DOI: 10.1209/epl/i2004-10255-9

Chiral perturbation theory for partially quenched twisted mass lattice QCD

G. Münster1, C. Schmidt1 and E. Scholz2

1  Institut für Theoretische Physik, Universität Münster Wilhelm-Klemm-Str. 9, D-48149 Münster, Germany
2  Deutsches Elektronen-Synchrotron DESY Notkestr. 85, D-22603 Hamburg, Germany

received 11 February 2004; accepted in final form 6 October 2004
published online 29 October 2004

Partially quenched Quantum Chromodynamics with Wilson fermions on a lattice is considered in the framework of chiral perturbation theory in the mesonic sector. Two degenerate quark flavours are associated with a chirally twisted mass term. The pion masses and decay constants are calculated in next-to-leading order including terms linear in the lattice spacing a.

11.15.Ha - Lattice gauge theory.
12.38.Gc - Lattice QCD calculations.
12.39.Fe - Chiral Lagrangians.

© EDP Sciences 2004