Lattice determination of heavy-light decay constants

C. Bernard, T. DeGrand, C. De Tar, Steven Gottlieb, Urs M. Heller, J. E. Hetrick, N. Ishizuka, C. McNeile, R. Sugar, William D Toussaint, M. Wingate

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Abstract

We report on the MILC Collaboration's calculation of fB,. fBA,fDA, fDA, and their ratios. Our central values come from the quenched approximation, hut the quenching error is estimated from NF = 2 dynamical staggered lattices. We use Wilson light valence quarks and Wilson and static heavy quarks. We find, for example. fB = 157 ± 11-9-0+25+23 MeV, fBA/fB = 1.11 ± 0. 02-0.03+0.04 ± 0.03, fDA, = 210 ± 9-9-1+25+17 MeV, and fB/fDA = 0.75 ± 0.03-0.02-0.00, where the errors are statistical, systematic (within the quenched approximation), and systematic (of quenching), respectively.

Original languageEnglish (US)
Pages (from-to)4812-4815
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number22
StatePublished - 1998

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quenching
quarks
decay
approximation
valence

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  • Physics and Astronomy(all)

Cite this

Bernard, C., DeGrand, T., De Tar, C., Gottlieb, S., Heller, U. M., Hetrick, J. E., ... Wingate, M. (1998). Lattice determination of heavy-light decay constants. Physical Review Letters, 81(22), 4812-4815.

Lattice determination of heavy-light decay constants. / Bernard, C.; DeGrand, T.; De Tar, C.; Gottlieb, Steven; Heller, Urs M.; Hetrick, J. E.; Ishizuka, N.; McNeile, C.; Sugar, R.; Toussaint, William D; Wingate, M.

In: Physical Review Letters, Vol. 81, No. 22, 1998, p. 4812-4815.

Research output: Contribution to journalArticle

Bernard, C, DeGrand, T, De Tar, C, Gottlieb, S, Heller, UM, Hetrick, JE, Ishizuka, N, McNeile, C, Sugar, R, Toussaint, WD & Wingate, M 1998, 'Lattice determination of heavy-light decay constants', Physical Review Letters, vol. 81, no. 22, pp. 4812-4815.
Bernard C, DeGrand T, De Tar C, Gottlieb S, Heller UM, Hetrick JE et al. Lattice determination of heavy-light decay constants. Physical Review Letters. 1998;81(22):4812-4815.
Bernard, C. ; DeGrand, T. ; De Tar, C. ; Gottlieb, Steven ; Heller, Urs M. ; Hetrick, J. E. ; Ishizuka, N. ; McNeile, C. ; Sugar, R. ; Toussaint, William D ; Wingate, M. / Lattice determination of heavy-light decay constants. In: Physical Review Letters. 1998 ; Vol. 81, No. 22. pp. 4812-4815.
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AU - De Tar, C.

AU - Gottlieb, Steven

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AU - Hetrick, J. E.

AU - Ishizuka, N.

AU - McNeile, C.

AU - Sugar, R.

AU - Toussaint, William D

AU - Wingate, M.

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AB - We report on the MILC Collaboration's calculation of fB,. fBA,fDA, fDA, and their ratios. Our central values come from the quenched approximation, hut the quenching error is estimated from NF = 2 dynamical staggered lattices. We use Wilson light valence quarks and Wilson and static heavy quarks. We find, for example. fB = 157 ± 11-9-0+25+23 MeV, fBA/fB = 1.11 ± 0. 02-0.03+0.04 ± 0.03, fDA, = 210 ± 9-9-1+25+17 MeV, and fB/fDA = 0.75 ± 0.03-0.02-0.00, where the errors are statistical, systematic (within the quenched approximation), and systematic (of quenching), respectively.

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