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Phys. Rev. D 51, 5101–5129 (1995)

Properties of B mesons in lattice QCD

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A. Duncan, E. Eichten, J. Flynn, B. Hill, G. Hockney, and H. Thacker
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
Fermilab, P.O. Box 500, Batavia, Illinois 60510
Physics Department, University of Southampton, Southampton SO17 1BJ, United Kingdom
Department of Physics, University of California, Los Angeles, California 90024
Department of Physics, University of Virginia, Charlottesville, Virginia 22901

Received 1 August 1994; published in the issue dated 1 May 1995

The results of an extensive study of B-meson properties in quenched lattice QCD are presented. The studies are carried out in the static quark limit where the b quark is taken to be infinitely massive. Our computations rely on a multistate smearing method introduced previously, with smearing functions generated from a relativistic lattice quark model. Systematic errors arising from excited state contamination, finite volume effects, and the chiral extrapolation for the light quarks are estimated. We obtain continuum results for the mass splitting MBs-MBu=86±12(stat)-9+7(syst) MeV, the ratio of decay constants fBs/fBu=1.22±0.04(stat)±0.02(syst). For the B-meson decay constant we separately exhibit the sizable uncertainties in the extrapolation to the continuum limit (a→0) and higher-order perturbative matching. We obtain fB=188±23(stat)±15(syst)-0+26(extrap)±14(pert) MeV.

© 1995 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.51.5101
DOI:
10.1103/PhysRevD.51.5101
PACS:
14.40.Nd, 12.38.Gc, 13.20.He
 
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