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Computing K and D meson masses with Nf=2+1+1 twisted mass lattice QCD

CEA, Centre de Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif-sur-Yvette, France; Laboratoire de Physique Théorique (Bât. 210), CNRS et Université Paris-Sud XI, Centre d'Orsay, 91405 Orsay, Cedex, France; Laboratoire de Physique Subatomique et Cosmologie, 53 avenue des Martyrs, 38026 Grenoble, France; Universität Münster, Institut für Theoretische Physik, Wilhelm-Klemm-Straße 9, D-48149 Münster, Germany; NIC, DESY, Platanenallee 6, D-15738 Zeuthen, Germany; Division of Theoretical Physics, University of Liverpool, L69 3BX Liverpool, United Kingdom; Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, D-22603 Hamburg, Germany; Centre for Theoretical Physics, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands; Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Germany; Bethe Center for Theoretical Physics, Universität Bonn, 53115 Bonn, Germany; Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, D-12489 Berlin, Germany; Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstr. 5, CH-3012 Bern, Switzerland
Computer Physics Communications (Impact Factor: 2.41). 02/2011; DOI: 10.1016/j.cpc.2010.10.004
Source: arXiv

ABSTRACT We discuss the computation of the mass of the K and D mesons within the framework of Nf=2+1+1 twisted mass lattice QCD from a technical point of view. These quantities are essential, already at the level of generating gauge configurations, being obvious candidates to tune the strange and charm quark masses to their physical values. In particular, we address the problems related to the twisted mass flavor and parity symmetry breaking, which arise when considering a non-degenerate (c,s) doublet. We propose and verify the consistency of three methods to extract the K and D meson masses in this framework.

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