The decay constants FDS, Fd+, FBS and Fb from lattice QCD

MILC Collaborations

Research output: Contribution to journalConference article

Abstract

In this report we summarize results for the leptonic decay constants fDs, fD+, fBs and fB, obtained at the three lattice spacings a ≈ 0.09, 0.125 and 0.15 fm, from the now concluded first computational phase of our on-going project. The decay constants are computed on the MILC collaboration's 2 + 1 flavor asqtad gauge ensembles. We use clover heavy quarks in the Fermilab interpretation and asqtad improved staggered light quarks. For each of the D and B meson systems, a simultaneous chiral and continuum extrapolation is performed with partially quenched lattice results. We show how improvements being implemented now, such as, higher statistics, additional finer lattice spacings and better determinations of inputs to the calculation, are expected to reduce future statistical and systematic uncertainties.

Original languageEnglish (US)
JournalProceedings of Science
Volume105
StatePublished - Jan 1 2010
Event28th International Symposium on Lattice Field Theory, Lattice 2010 - Villasimius, Sardinia, Italy
Duration: Jun 14 2010Jun 19 2010

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quantum chromodynamics
decay
spacing
quarks
extrapolation
mesons
statistics
continuums

ASJC Scopus subject areas

  • General

Cite this

The decay constants FDS, Fd+, FBS and Fb from lattice QCD. / MILC Collaborations.

In: Proceedings of Science, Vol. 105, 01.01.2010.

Research output: Contribution to journalConference article

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abstract = "In this report we summarize results for the leptonic decay constants fDs, fD+, fBs and fB, obtained at the three lattice spacings a ≈ 0.09, 0.125 and 0.15 fm, from the now concluded first computational phase of our on-going project. The decay constants are computed on the MILC collaboration's 2 + 1 flavor asqtad gauge ensembles. We use clover heavy quarks in the Fermilab interpretation and asqtad improved staggered light quarks. For each of the D and B meson systems, a simultaneous chiral and continuum extrapolation is performed with partially quenched lattice results. We show how improvements being implemented now, such as, higher statistics, additional finer lattice spacings and better determinations of inputs to the calculation, are expected to reduce future statistical and systematic uncertainties.",
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T1 - The decay constants FDS, Fd+, FBS and Fb from lattice QCD

AU - MILC Collaborations

AU - Lattice, Fermilab

AU - Bailey, J. A.

AU - Bazavov, A.

AU - Bernard, C.

AU - Bouchard, C.

AU - DeTar, C.

AU - El-Khadra, A. X.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Hetrick, J. E.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - Mackenzie, P. B.

AU - Oktay, M. B.

AU - Simone, J. N.

AU - Sugar, R.

AU - Toussaint, William D

AU - Van De Water, R. S.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - In this report we summarize results for the leptonic decay constants fDs, fD+, fBs and fB, obtained at the three lattice spacings a ≈ 0.09, 0.125 and 0.15 fm, from the now concluded first computational phase of our on-going project. The decay constants are computed on the MILC collaboration's 2 + 1 flavor asqtad gauge ensembles. We use clover heavy quarks in the Fermilab interpretation and asqtad improved staggered light quarks. For each of the D and B meson systems, a simultaneous chiral and continuum extrapolation is performed with partially quenched lattice results. We show how improvements being implemented now, such as, higher statistics, additional finer lattice spacings and better determinations of inputs to the calculation, are expected to reduce future statistical and systematic uncertainties.

AB - In this report we summarize results for the leptonic decay constants fDs, fD+, fBs and fB, obtained at the three lattice spacings a ≈ 0.09, 0.125 and 0.15 fm, from the now concluded first computational phase of our on-going project. The decay constants are computed on the MILC collaboration's 2 + 1 flavor asqtad gauge ensembles. We use clover heavy quarks in the Fermilab interpretation and asqtad improved staggered light quarks. For each of the D and B meson systems, a simultaneous chiral and continuum extrapolation is performed with partially quenched lattice results. We show how improvements being implemented now, such as, higher statistics, additional finer lattice spacings and better determinations of inputs to the calculation, are expected to reduce future statistical and systematic uncertainties.

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