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Studies of B and B_s Meson Leptonic Decays with NRQCD Bottom and HISQ Light/Strange Quarks

Authors
  • Shigemitsu, Junko
  • Na, Heechang
  • Davies, Christine
  • Horgan, Ron
  • Monahan, Chris
  • Lepage, Peter
Type
Preprint
Publication Date
Oct 26, 2011
Submission Date
Oct 26, 2011
Identifiers
arXiv ID: 1110.5783
Source
arXiv
License
Yellow
External links

Abstract

We present a progress report on new calculations of B and B_s meson decay constants employing NRQCD heavy and HISQ light valence quarks and using MILC N_f = 2+1 AsqTad lattices. Bare quark masses have been retuned in accord with HPQCD's new r_1 scale. We find significant reductions in discretization effects compared to previous calculations with AsqTad light valence quarks. Matching of the NRQCD/HISQ heavy-light axial vector current is carried out at one-loop order including all relevant dimension 4 current corrections.

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