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(αa) discretization correction to the heavy-light axial vector current. We find f_B = 0.147(11)(^{+8}_{-12})(9)(6) MeV and f_{B_s}/f_B = 1.20(4)(^{+4}_{-0}). PACS numbers: 12.38.Gc, 12.39.Hg, 13.20.He, 14.40.Nd

LaTeX file, 14 pages, typos corrected, to be published in Phys. Lett. B

References in corpus (3)

• Heavy light mesons at a larger lattice spacing
• Heavy-Light Decay Constants from Wilson and Static Quarks
• Perturbative Matching of the NRQCD Heavy-Light Axial Current

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