Numerical simulations with two flavours of twisted-mass Wilson quarks and DBW2 gauge action
F. Farchioni, P. Hofmann, K. Jansen, I. Montvay, G. Muenster, E. E. Scholz, L. Scorzato, A. Shindler, N. Ukita, C. Urbach, U. Wenger, I. Wetzorke
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.
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