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

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arxiv 1005.2042 v1 pith:E5PBCKFO submitted 2010-05-12 hep-lat

ETM Collaboration: Remi Baron , Philippe Boucaud , Jaume Carbonell , Vincent Drach , Federico Farchioni , Gregorio Herdoiza , Karl Jansen , Chris Michael
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Istvan Montvay Elisabetta Pallante Olivier Pene Siebren Reker Carsten Urbach Marc Wagner Urs Wenger
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classification hep-lat
keywords massmassestwistedframeworklatticemesonaddressalready
verification ladder T0 review T1 audit T2 compute T3 formal
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We discuss the computation of the mass of the K and D mesons within the framework of N_f = 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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  1. Spectral parameters of the $\rho$ resonance from lattice QCD

    hep-lat 2025-02 conditional novelty 6.0 of 10

    Lattice QCD with physical pion mass and three lattice spacings yields rho mass 781.6 +/- 10.0 MeV and width 146.5 +/- 9.9 MeV, matching experiment.

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