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

MILC Collaborations

The decay constants F_DS, F_d+, F_BS and F_b from lattice QCD

MILC Collaborations

Integrated Sciences and Engineering Division

Research output: Contribution to journal › Conference article › peer-review

Abstract

In this report we summarize results for the leptonic decay constants f_Ds, f_D+, f_Bs and f_B, 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 language	English
Journal	Proceedings of Science
Volume	105
Publication status	Published - 2010
Event	28th International Symposium on Lattice Field Theory, Lattice 2010 - Villasimius, Sardinia, Italy Duration: 2010 Jun 14 → 2010 Jun 19

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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

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@article{5462178ae1f64d939bc78cd25daa2ce0,

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

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.",

author = "{MILC Collaborations} and Fermilab Lattice and Bailey, {J. A.} and A. Bazavov and C. Bernard and C. Bouchard and C. DeTar and El-Khadra, {A. X.} and Freeland, {E. D.} and E. G{\'a}miz and Steven Gottlieb and Heller, {U. M.} and Hetrick, {J. E.} and Kronfeld, {A. S.} and J. Laiho and L. Levkova and Mackenzie, {P. B.} and Oktay, {M. B.} and Simone, {J. N.} and R. Sugar and D. Toussaint and {Van De Water}, {R. S.}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 28th International Symposium on Lattice Field Theory, Lattice 2010 ; Conference date: 14-06-2010 Through 19-06-2010",

year = "2010",

language = "English",

volume = "105",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

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, D.

AU - Van De Water, R. S.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2010

Y1 - 2010

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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M3 - Conference article

AN - SCOPUS:85055351815

SN - 1824-8039

VL - 105

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 28th International Symposium on Lattice Field Theory, Lattice 2010

Y2 - 14 June 2010 through 19 June 2010

ER -

The decay constants F_DS, F_d+, F_BS and F_b from lattice QCD

Abstract

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All Science Journal Classification (ASJC) codes

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