B Meson Decay Constants From NRQCD

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  • 27 January 1998
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(\alpha/M) taking operator mixing fully into account. This includes an important O(\alpha a) discretization correction to the heavy-light axial vector current. We find f_B = 0.147(^{+17}_{-20})GeV and f_{B_s}/f_B = 1.20(^{+6}_{-4}). PACS numbers: 12.38.Gc, 12.39.Hg, 13.20.He, 14.40.Nd

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