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B meson decay constants from NRQCD

Jan, 1998

14 pages

Published in:

Phys.Lett.B 427 (1998) 132-140

e-Print:

hep-lat/9801038 [hep-lat]

DOI:

10.1016/S0370-2693(98)00323-2

Report number:

OHSTPY-HEP-T-97-017

View in:

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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

Note:

LaTeX file, 14 pages, typos corrected, to be published in Phys. Lett. B Report-no: OHSTPY-HEP-T-97-017, LAUR-97-4642, UCSD/PTH 98-12 Journal-ref: Phys.Lett. B427 (1998) 132-140 DOI: 10.1016/S0370-2693(98)00323-2

12.38.Gc
12.39.Hg
13.20.He
14.40.Ndi
B: decay constant
B/s: decay constant
quantum chromodynamics: nonrelativistic
lattice field theory: action
approximation: quenching
current: axial-vector

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