B- and D-meson decay constants from three-flavor lattice QCD

A. Bazavov; C. Bernard; C. M. Bouchard; C. Detar; M. Di Pierro; A. X. El-Khadra; R. T. Evans; E. D. Freeland; E. Gámiz; Steven Gottlieb; U. M. Heller; J. E. Hetrick; R. Jain; A. S. Kronfeld; J. Laiho; L. Levkova; P. B. MacKenzie; E. T. Neil; M. B. Oktay; J. N. Simone; R. Sugar; D. Toussaint; R. S. Van De Water

doi:10.1103/PhysRevD.85.114506

B- and D-meson decay constants from three-flavor lattice QCD

A. Bazavov, C. Bernard, C. M. Bouchard, C. Detar, M. Di Pierro, A. X. El-Khadra, R. T. Evans, E. D. Freeland, E. Gámiz, Steven Gottlieb, U. M. Heller, J. E. Hetrick, R. Jain, A. S. Kronfeld, J. Laiho, L. Levkova, P. B. MacKenzie, E. T. Neil, M. B. Oktay, J. N. SimoneR. Sugar, D. Toussaint, R. S. Van De Water

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

223 Scopus citations

Abstract

We calculate the leptonic decay constants of B _(s) and D _(s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light-meson correlation functions on the MILC Asqtad-improved staggered gauge configurations, which include the effects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ∼m _s/10) and at three lattice spacings (a≈0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light-meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory, and higher-order terms are expected to be small. We use the two finer lattice spacings for our central analysis, and we use the third to help estimate discretization errors. We obtain f _B+=196.9(9.1)MeV, f _Bs=242.0(10.0)MeV, f _D ⁺=218.9(11.3)MeV, f _Ds=260.1(10.8)MeV, and the SU(3) flavor-breaking ratios f _Bs/f _B=1.229(26) and f _Ds/f _D=1.188(25) , where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.

Original language	English (US)
Article number	114506
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	85
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.85.114506
State	Published - Jun 8 2012
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1103/PhysRevD.85.114506

Cite this

Bazavov, A., Bernard, C., Bouchard, C. M., Detar, C., Di Pierro, M., El-Khadra, A. X., Evans, R. T., Freeland, E. D., Gámiz, E., Gottlieb, S., Heller, U. M., Hetrick, J. E., Jain, R., Kronfeld, A. S., Laiho, J., Levkova, L., MacKenzie, P. B., Neil, E. T., Oktay, M. B., ... Van De Water, R. S. (2012). B- and D-meson decay constants from three-flavor lattice QCD. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85(11), Article 114506. https://doi.org/10.1103/PhysRevD.85.114506

Bazavov, A, Bernard, C, Bouchard, CM, Detar, C, Di Pierro, M, El-Khadra, AX, Evans, RT, Freeland, ED, Gámiz, E, Gottlieb, S, Heller, UM, Hetrick, JE, Jain, R, Kronfeld, AS, Laiho, J, Levkova, L, MacKenzie, PB, Neil, ET, Oktay, MB, Simone, JN, Sugar, R, Toussaint, D & Van De Water, RS 2012, 'B- and D-meson decay constants from three-flavor lattice QCD', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 85, no. 11, 114506. https://doi.org/10.1103/PhysRevD.85.114506

@article{a4edc99d417540d29bb447f2386009e4,

title = "B- and D-meson decay constants from three-flavor lattice QCD",

abstract = "We calculate the leptonic decay constants of B (s) and D (s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light-meson correlation functions on the MILC Asqtad-improved staggered gauge configurations, which include the effects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ∼m s/10) and at three lattice spacings (a≈0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light-meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory, and higher-order terms are expected to be small. We use the two finer lattice spacings for our central analysis, and we use the third to help estimate discretization errors. We obtain f B+=196.9(9.1)MeV, f Bs=242.0(10.0)MeV, f D +=218.9(11.3)MeV, f Ds=260.1(10.8)MeV, and the SU(3) flavor-breaking ratios f Bs/f B=1.229(26) and f Ds/f D=1.188(25) , where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.",

author = "A. Bazavov and C. Bernard and Bouchard, {C. M.} and C. Detar and {Di Pierro}, M. and El-Khadra, {A. X.} and Evans, {R. T.} and Freeland, {E. D.} and E. G{\'a}miz and Steven Gottlieb and Heller, {U. M.} and Hetrick, {J. E.} and R. Jain and Kronfeld, {A. S.} and J. Laiho and L. Levkova and MacKenzie, {P. B.} and Neil, {E. T.} and Oktay, {M. B.} and Simone, {J. N.} and R. Sugar and D. Toussaint and {Van De Water}, {R. S.}",

year = "2012",

month = jun,

day = "8",

doi = "10.1103/PhysRevD.85.114506",

language = "English (US)",

volume = "85",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "11",

}

TY - JOUR

T1 - B- and D-meson decay constants from three-flavor lattice QCD

AU - Bazavov, A.

AU - Bernard, C.

AU - Bouchard, C. M.

AU - Detar, C.

AU - Di Pierro, M.

AU - El-Khadra, A. X.

AU - Evans, R. T.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Hetrick, J. E.

AU - Jain, R.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - MacKenzie, P. B.

AU - Neil, E. T.

AU - Oktay, M. B.

AU - Simone, J. N.

AU - Sugar, R.

AU - Toussaint, D.

AU - Van De Water, R. S.

PY - 2012/6/8

Y1 - 2012/6/8

N2 - We calculate the leptonic decay constants of B (s) and D (s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light-meson correlation functions on the MILC Asqtad-improved staggered gauge configurations, which include the effects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ∼m s/10) and at three lattice spacings (a≈0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light-meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory, and higher-order terms are expected to be small. We use the two finer lattice spacings for our central analysis, and we use the third to help estimate discretization errors. We obtain f B+=196.9(9.1)MeV, f Bs=242.0(10.0)MeV, f D +=218.9(11.3)MeV, f Ds=260.1(10.8)MeV, and the SU(3) flavor-breaking ratios f Bs/f B=1.229(26) and f Ds/f D=1.188(25) , where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.

AB - We calculate the leptonic decay constants of B (s) and D (s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light-meson correlation functions on the MILC Asqtad-improved staggered gauge configurations, which include the effects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ∼m s/10) and at three lattice spacings (a≈0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light-meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory, and higher-order terms are expected to be small. We use the two finer lattice spacings for our central analysis, and we use the third to help estimate discretization errors. We obtain f B+=196.9(9.1)MeV, f Bs=242.0(10.0)MeV, f D +=218.9(11.3)MeV, f Ds=260.1(10.8)MeV, and the SU(3) flavor-breaking ratios f Bs/f B=1.229(26) and f Ds/f D=1.188(25) , where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.

UR - http://www.scopus.com/inward/record.url?scp=84862276078&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862276078&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.85.114506

DO - 10.1103/PhysRevD.85.114506

M3 - Article

AN - SCOPUS:84862276078

SN - 1550-7998

VL - 85

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 11

M1 - 114506

ER -

B- and D-meson decay constants from three-flavor lattice QCD

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this