The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD

A. Bazavov, C. Bernard, C. Bouchard, C. Detar, D. Du, A. X. El-Khadra, J. Foley, E. D. Freeland, E. Gámiz, Steven Gottlieb, U. M. Heller, J. Kim, J. Komijani, A. S. Kronfeld, John W Laiho, L. Levkova, P. B. Mackenzie, D. Mohler, E. T. Neil, M. B. OktaydS. Qiu, J. N. Simone, R. L. Sugar, D. Toussaint, R. S. Van De Water, R. Zhou

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Abstract

We present a study of the D and B leptonic decay constants on the MILC Nf = 2+1 asqtad gauge ensembles using asqtad-improved staggered light quarks and clover heavy quarks in the Fermilab interpretation. Our previous analysis [1] computed the decay constants at lattice spacings a 0:14;0:11 and 0:083fm. We have extended the simulations to finer a 0:058 and 0:043fm lattice spacings, and have also increased statistics; this allows us to address many important sources of uncertainty. Technical advances include a two-step two-point fit procedure, better tuning of the heavy quark masses and a better determination of the axial-vector current matching. The present analysis remains blinded, so here we focus on the improvements and their predicted impact on the error budget compared to the prior analysis.

Original languageEnglish (US)
Article number394
JournalUnknown Journal
Volume29-July-2013
StatePublished - 2013

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quantum chromodynamics
quarks
decay
spacing
vector currents
budgets
tuning
statistics
simulation

ASJC Scopus subject areas

  • General

Cite this

Bazavov, A., Bernard, C., Bouchard, C., Detar, C., Du, D., El-Khadra, A. X., ... Zhou, R. (2013). The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD. Unknown Journal, 29-July-2013, [394].

The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD. / Bazavov, A.; Bernard, C.; Bouchard, C.; Detar, C.; Du, D.; El-Khadra, A. X.; Foley, J.; Freeland, E. D.; Gámiz, E.; Gottlieb, Steven; Heller, U. M.; Kim, J.; Komijani, J.; Kronfeld, A. S.; Laiho, John W; Levkova, L.; Mackenzie, P. B.; Mohler, D.; Neil, E. T.; Oktayd, M. B.; Qiu, S.; Simone, J. N.; Sugar, R. L.; Toussaint, D.; Van De Water, R. S.; Zhou, R.

In: Unknown Journal, Vol. 29-July-2013, 394, 2013.

Research output: Contribution to journalArticle

Bazavov, A, Bernard, C, Bouchard, C, Detar, C, Du, D, El-Khadra, AX, Foley, J, Freeland, ED, Gámiz, E, Gottlieb, S, Heller, UM, Kim, J, Komijani, J, Kronfeld, AS, Laiho, JW, Levkova, L, Mackenzie, PB, Mohler, D, Neil, ET, Oktayd, MB, Qiu, S, Simone, JN, Sugar, RL, Toussaint, D, Van De Water, RS & Zhou, R 2013, 'The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD', Unknown Journal, vol. 29-July-2013, 394.
Bazavov A, Bernard C, Bouchard C, Detar C, Du D, El-Khadra AX et al. The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD. Unknown Journal. 2013;29-July-2013. 394.
Bazavov, A. ; Bernard, C. ; Bouchard, C. ; Detar, C. ; Du, D. ; El-Khadra, A. X. ; Foley, J. ; Freeland, E. D. ; Gámiz, E. ; Gottlieb, Steven ; Heller, U. M. ; Kim, J. ; Komijani, J. ; Kronfeld, A. S. ; Laiho, John W ; Levkova, L. ; Mackenzie, P. B. ; Mohler, D. ; Neil, E. T. ; Oktayd, M. B. ; Qiu, S. ; Simone, J. N. ; Sugar, R. L. ; Toussaint, D. ; Van De Water, R. S. ; Zhou, R. / The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD. In: Unknown Journal. 2013 ; Vol. 29-July-2013.
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T1 - The Ds, D+, Bs and B decay constants from 2+1 flavor lattice QCD

AU - Bazavov, A.

AU - Bernard, C.

AU - Bouchard, C.

AU - Detar, C.

AU - Du, D.

AU - El-Khadra, A. X.

AU - Foley, J.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Kim, J.

AU - Komijani, J.

AU - Kronfeld, A. S.

AU - Laiho, John W

AU - Levkova, L.

AU - Mackenzie, P. B.

AU - Mohler, D.

AU - Neil, E. T.

AU - Oktayd, M. B.

AU - Qiu, S.

AU - Simone, J. N.

AU - Sugar, R. L.

AU - Toussaint, D.

AU - Van De Water, R. S.

AU - Zhou, R.

PY - 2013

Y1 - 2013

N2 - We present a study of the D and B leptonic decay constants on the MILC Nf = 2+1 asqtad gauge ensembles using asqtad-improved staggered light quarks and clover heavy quarks in the Fermilab interpretation. Our previous analysis [1] computed the decay constants at lattice spacings a 0:14;0:11 and 0:083fm. We have extended the simulations to finer a 0:058 and 0:043fm lattice spacings, and have also increased statistics; this allows us to address many important sources of uncertainty. Technical advances include a two-step two-point fit procedure, better tuning of the heavy quark masses and a better determination of the axial-vector current matching. The present analysis remains blinded, so here we focus on the improvements and their predicted impact on the error budget compared to the prior analysis.

AB - We present a study of the D and B leptonic decay constants on the MILC Nf = 2+1 asqtad gauge ensembles using asqtad-improved staggered light quarks and clover heavy quarks in the Fermilab interpretation. Our previous analysis [1] computed the decay constants at lattice spacings a 0:14;0:11 and 0:083fm. We have extended the simulations to finer a 0:058 and 0:043fm lattice spacings, and have also increased statistics; this allows us to address many important sources of uncertainty. Technical advances include a two-step two-point fit procedure, better tuning of the heavy quark masses and a better determination of the axial-vector current matching. The present analysis remains blinded, so here we focus on the improvements and their predicted impact on the error budget compared to the prior analysis.

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