B Meson Decay Constants From NRQCD

A. Ali Khan; T. Bhattacharya; S. Collins; C. T. H. Davies; R. Gupta; C. Morningstar; J. Shigemitsu; J. Sloan

doi:10.1016/S0370-2693(98)00323-2

B Meson Decay Constants From NRQCD

High Energy Physics - Lattice 2010-01-18 v3

Authors: A. Ali Khan , T. Bhattacharya , S. Collins , C. T. H. Davies , R. Gupta , C. Morningstar , J. Shigemitsu , J. Sloan

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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(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

Keywords

lattice qcd meson decay qcd corrections in b decays b meson physics

Cite

@article{arxiv.hep-lat/9801038,
  title  = {B Meson Decay Constants From NRQCD},
  author = {A. Ali Khan and T. Bhattacharya and S. Collins and C. T. H. Davies and R. Gupta and C. Morningstar and J. Shigemitsu and J. Sloan},
  journal= {arXiv preprint arXiv:hep-lat/9801038},
  year   = {2010}
}

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

B Meson Decay Constants From NRQCD

Abstract

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