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
TL;DR
This paper investigates discretisation errors in two-flavour lattice QCD with Wilson-quarks and DBW2 gauge action by comparing simulation data at different couplings and twisted mass values, and compares results to chiral perturbation theory.
Contribution
It provides a comparative analysis of discretisation errors in lattice QCD with different gauge actions and twisted mass parameters, validated against chiral perturbation theory.
Findings
Discretisation errors vary with gauge coupling and twisted mass.
Data aligns with next-to-leading order chiral perturbation theory.
Comparison between DBW2 and Wilson plaquette gauge actions highlights differences.
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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