B Meson Decay Constants From NRQCD
Abstract
We present quenched results for B meson decay constants using NRQCD b quarks and O(a) tadpole improved clover light quarks. For the first time, one-loop matching factors between lattice and continuum currents are incorporated through O(α/M) taking operator mixing fully into account. This includes an important O(α a) discretization correction to the heavy-light axial vector current. We find fB = 0.147(11)(+8-12)(9)(6) MeV and fBs/fB = 1.20(4)(+4-0). PACS numbers: 12.38.Gc, 12.39.Hg, 13.20.He, 14.40.Nd
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