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Pseudoscalar meson physics with four dynamical quarks

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arxiv 1210.8431 v1 pith:JVNSBLMZ submitted 2012-10-31 hep-lat hep-ph

A. Bazavov , C. Bernard , C. Bouchard , C. DeTar , D. Du , A.X. El-Khadra , J. Foley , E.D. Freeland
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E. Gamiz Steven Gottlieb U.M. Heller J.E. Hetrick J. Kim A.S. Kronfeld J. Laiho L. Levkova M. Lightman P.B. Mackenzie E.T. Neil M. Oktay J.N. Simone R.L. Sugar D. Toussaint R.S. Van de Water R. Zhou (for the Fermilab Lattice Collaboration for the MILC Collaboration)
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classification hep-lathep-ph
keywords mesonconstantsdecaydynamicalfourmassesphysicspseudoscalar
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We present preliminary results for light, strange and charmed pseudoscalar meson physics from simulations using four flavors of dynamical quarks with the highly improved staggered quark (HISQ) action. These simulations include lattice spacings ranging from 0.15 to 0.06 fm, and sea-quark masses both above and at their physical value. The major results are charm meson decay constants f_D, f_{D_s} and f_{D_s}/f_D and ratios of quark masses. This talk will focus on our procedures for finding the decay constants on each ensemble, the continuum extrapolation, and estimates of systematic error.

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  1. Prospective analysis of CKM element $|V_{cd}|$ and $D^+$-meson decay constant from leptonic decays $D^+ \to \ell^+ \nu$

    hep-ph 2024-11 conditional novelty 3.0 of 10

    A QCD sum rule calculation with dimension-six condensates gives f_D+ = 203.0 ± 1.5 MeV and, with BESIII data, |Vcd| = 0.227 +0.002 -0.001.

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