Progress Calculating Decay Constants with NRQCD and AsqTad Actions

Matthew Wingate; Christine Davies; Alan Gray; Emel Gulez; G. Peter Lepage; Junko Shigemitsu

Progress Calculating Decay Constants with NRQCD and AsqTad Actions

High Energy Physics - Lattice 2007-05-23 v1

Authors: Matthew Wingate , Christine Davies , Alan Gray , Emel Gulez , G. Peter Lepage , Junko Shigemitsu

Abstract

We combine a light AsqTad antiquark with a nonrelativistic heavy quark to compute the decay constants of heavy-light pseudoscalar mesons using the ensemble of 3-flavor gauge field configurations generated by the MILC collaboration. Preliminary results for $f_{B_s}$ and $f_{D_s}$ are given and status of the chiral extrapolation to $f_B$ is reported. We also touch upon results of the perturbative calculation which matches matrix elements in the effective theory to the full theory at 1-loop order.

Keywords

decay constants NRQCD AsqTad action heavy-light mesons lattice QCD

Cite

@article{arxiv.hep-lat/0309092,
  title  = {Progress Calculating Decay Constants with NRQCD and AsqTad Actions},
  author = {Matthew Wingate and Christine Davies and Alan Gray and Emel Gulez and G. Peter Lepage and Junko Shigemitsu},
  journal= {arXiv preprint arXiv:hep-lat/0309092},
  year   = {2007}
}

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Talk delivered at Lattice2003(heavy), 3 pages

Progress Calculating Decay Constants with NRQCD and AsqTad Actions

Abstract

Keywords

Cite

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