Eur. Phys. J. C (2007) 50: 373-383
https://doi.org/10.1140/epjc/s10052-006-0204-4

Regular Article - Theoretical Physics

Numerical simulation of QCD with u, d, s and c quarks in the twisted-mass Wilson formulation

¹ Università Milano Bicocca, Piazza della Scienza 3, 20126, Milano, Italy
² Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Strasse 9, 48149, Münster, Germany
³ NIC, DESY, Zeuthen, Platanenallee 6, 15738, Zeuthen, Germany
⁴ Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22603, Hamburg, Germany
⁵ Physics Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
⁶ ECT*, strada delle tabarelle 286, 38050, Villazzano (TN), Italy
⁷ Theoretical Physics Division, Dept. of Mathematical Sciences, University of Liverpool, Liverpool, L69 3BX, UK

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

Received: 3 July 2006
Accepted: 22 November 2006
Published online: 10 February 2007

Abstract

A first study of numerical Monte Carlo simulations with two quark doublets, a mass-degenerate one and a mass-split one, interpreted as u, d, s and c quarks, is carried out in the framework of the twisted mass Wilson lattice formulation. Tuning the bare parameters of this theory is explored on 12³·24 and 16³·32 lattices at lattice spacings a≃0.20 fm and a≃0.15 fm, respectively.