Studies of B and Bs Meson Leptonic Decays with NRQCD Bottom and HISQ Light/Strange Quarks
Abstract
We present a progress report on new calculations of B and Bs meson decay constants employing NRQCD heavy and HISQ light valence quarks and using MILC Nf = 2+1 AsqTad lattices. Bare quark masses have been retuned in accord with HPQCD's new r1 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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