Eur. Phys. J. C (2006) 47: 453-472
https://doi.org/10.1140/epjc/s2006-02549-y

Theoretical Physics

Numerical simulations with two flavours of twisted-mass Wilson quarks and DBW2 gauge action

¹ Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Strasse 9, 48149, Münster, Germany
² NIC/DESY Zeuthen, Platanenallee 6, 15738, Zeuthen, Germany
³ Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22603, Hamburg, Germany
⁴ Institut für Physik, Humboldt Universität zu Berlin, 12489, Berlin, Germany
⁵ Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, 14196, Berlin, Germany

^* e-mail: montvay@mail.desy.de

Received: 19 December 2005
Revised: 21 March 2006
Published online: 7 June 2006

Abstract

Discretisation errors in two-flavour lattice QCD with Wilson quarks and DBW2 gauge action are investigated by comparing numerical simulation data at two values of the bare gauge coupling. Both non-zero- and zero-twisted-mass values are considered. The results, including also data from simulations using the Wilson plaquette gauge action, are compared to next-to-leading order chiral perturbation theory formulas.