The Ds and D+ Leptonic Decay Constants from Lattice QCD

A. Bazavov; C. Bernard; C. DeTar; E. D. Freeland; E. Gamiz; Steven Gottlieb; U. M. Heller; J. E. Hetrick; A. X. El-Khadra; A. S. Kronfeld; J. Laiho; L. Levkova; P. B. Mackenzie; M. B. Oktay; M. Di Pierro; J. N. Simone; R. Sugar; D. Toussaint; R. S. Van De Water

The Ds and D+ Leptonic Decay Constants from Lattice QCD

A. Bazavov, C. Bernard, C. DeTar, E. D. Freeland, E. Gamiz, Steven Gottlieb, U. M. Heller, J. E. Hetrick, A. X. El-Khadra, A. S. Kronfeld, J. Laiho, L. Levkova, P. B. Mackenzie, M. B. Oktay, M. Di Pierro, J. N. Simone, R. Sugar, D. Toussaint, R. S. Van De Water

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

1 Scopus citations

Abstract

We present the leptonic decay constants fDs and fD+ computed on the MILC collaboration's 2+1 flavor asqtad gauge ensembles. We use clover heavy quarks with the Fermilab interpretation and improved staggered light quarks. The simultaneous chiral and continuum extrapolation, which determines both decay constants, includes partially-quenched lattice results at lattice spacings a 0:09, 0:12 and 0:15 fm. We have made several recent improvements in our analysis: a) we include terms in the fit describing leading order heavy-quark discretization effects, b) we have adopted a more precise input r1 value consistent with our other D and B meson studies, c) we have retuned the input bare charm masses based upon the new r1. Our preliminary results are fDs = 26010 MeV and fD+ = 21710 MeV.

Original language	English (US)
Journal	Proceedings of Science
Volume	91
State	Published - 2009
Externally published	Yes
Event	27th International Symposium on Lattice Field Theory, LAT 2009 - Beijing, China Duration: Jul 26 2009 → Jul 31 2009

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Bazavov, A., Bernard, C., DeTar, C., Freeland, E. D., Gamiz, E., Gottlieb, S., Heller, U. M., Hetrick, J. E., El-Khadra, A. X., Kronfeld, A. S., Laiho, J., Levkova, L., Mackenzie, P. B., Oktay, M. B., Di Pierro, M., Simone, J. N., Sugar, R., Toussaint, D., & Van De Water, R. S. (2009). The Ds and D+ Leptonic Decay Constants from Lattice QCD. Proceedings of Science, 91.

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title = "The Ds and D+ Leptonic Decay Constants from Lattice QCD",

abstract = "We present the leptonic decay constants fDs and fD+ computed on the MILC collaboration's 2+1 flavor asqtad gauge ensembles. We use clover heavy quarks with the Fermilab interpretation and improved staggered light quarks. The simultaneous chiral and continuum extrapolation, which determines both decay constants, includes partially-quenched lattice results at lattice spacings a 0:09, 0:12 and 0:15 fm. We have made several recent improvements in our analysis: a) we include terms in the fit describing leading order heavy-quark discretization effects, b) we have adopted a more precise input r1 value consistent with our other D and B meson studies, c) we have retuned the input bare charm masses based upon the new r1. Our preliminary results are fDs = 26010 MeV and fD+ = 21710 MeV.",

author = "A. Bazavov and C. Bernard and C. DeTar and Freeland, {E. D.} and E. Gamiz and Steven Gottlieb and Heller, {U. M.} and Hetrick, {J. E.} and El-Khadra, {A. X.} and Kronfeld, {A. S.} and J. Laiho and L. Levkova and Mackenzie, {P. B.} and Oktay, {M. B.} and {Di Pierro}, M. 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.; 27th International Symposium on Lattice Field Theory, LAT 2009 ; Conference date: 26-07-2009 Through 31-07-2009",

year = "2009",

language = "English (US)",

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TY - JOUR

T1 - The Ds and D+ Leptonic Decay Constants from Lattice QCD

AU - Bazavov, A.

AU - Bernard, C.

AU - DeTar, C.

AU - Freeland, E. D.

AU - Gamiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Hetrick, J. E.

AU - El-Khadra, A. X.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - Mackenzie, P. B.

AU - Oktay, M. B.

AU - Di Pierro, M.

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 - 2009

Y1 - 2009

N2 - We present the leptonic decay constants fDs and fD+ computed on the MILC collaboration's 2+1 flavor asqtad gauge ensembles. We use clover heavy quarks with the Fermilab interpretation and improved staggered light quarks. The simultaneous chiral and continuum extrapolation, which determines both decay constants, includes partially-quenched lattice results at lattice spacings a 0:09, 0:12 and 0:15 fm. We have made several recent improvements in our analysis: a) we include terms in the fit describing leading order heavy-quark discretization effects, b) we have adopted a more precise input r1 value consistent with our other D and B meson studies, c) we have retuned the input bare charm masses based upon the new r1. Our preliminary results are fDs = 26010 MeV and fD+ = 21710 MeV.

AB - We present the leptonic decay constants fDs and fD+ computed on the MILC collaboration's 2+1 flavor asqtad gauge ensembles. We use clover heavy quarks with the Fermilab interpretation and improved staggered light quarks. The simultaneous chiral and continuum extrapolation, which determines both decay constants, includes partially-quenched lattice results at lattice spacings a 0:09, 0:12 and 0:15 fm. We have made several recent improvements in our analysis: a) we include terms in the fit describing leading order heavy-quark discretization effects, b) we have adopted a more precise input r1 value consistent with our other D and B meson studies, c) we have retuned the input bare charm masses based upon the new r1. Our preliminary results are fDs = 26010 MeV and fD+ = 21710 MeV.

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M3 - Conference Article

AN - SCOPUS:85055288312

SN - 1824-8039

VL - 91

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 27th International Symposium on Lattice Field Theory, LAT 2009

Y2 - 26 July 2009 through 31 July 2009

ER -

The Ds and D+ Leptonic Decay Constants from Lattice QCD

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