Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al.

Jon A. Bailey; A. Bazavov; C. Bernard; C. M. Bouchard; C. Detar; Daping Du; A. X. El-Khadra; J. Foley; E. D. Freeland; E. Gámiz; Steven Gottlieb; U. M. Heller; A. S. Kronfeld; J. Laiho; L. Levkova; P. B. MacKenzie; E. T. Neil; Si Wei Qiu; J. Simone; R. Sugar; D. Toussaint; R. S. Van De Water; Ran Zhou

doi:10.1103/PhysRevD.89.114504

Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al.

Jon A. Bailey, A. Bazavov, C. Bernard, C. M. Bouchard, C. Detar, Daping Du, A. X. El-Khadra, J. Foley, E. D. Freeland, E. Gámiz, Steven Gottlieb, U. M. Heller, A. S. Kronfeld, J. Laiho, L. Levkova, P. B. MacKenzie, E. T. Neil, Si Wei Qiu, J. Simone, R. SugarD. Toussaint, R. S. Van De Water, Ran Zhou

Department of Physics

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

179 Scopus citations

Abstract

We compute the zero-recoil form factor for the semileptonic decay B̄0→D*+-ν̄ (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC asqtad configurations), and the Fermilab action for the heavy quarks. Our calculations incorporate higher statistics, finer lattice spacings, and lighter quark masses than our 2008 work. As a byproduct of tuning the new data set, we obtain the Ds and Bs hyperfine splittings with few-MeV accuracy. For the zero-recoil form factor, we obtain F(1)=0.906(4)(12), where the first error is statistical and the second is the sum in quadrature of all systematic errors. With the latest Heavy Flavor Averaging Group average of experimental results and a cautious treatment of QED effects, we find |Vcb|=(39.04±0.49expt±0. 53QCD±0.19QED)×10-3. The QCD error is now commensurate with the experimental error.

Original language	English (US)
Article number	114504
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	89
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.89.114504
State	Published - Jun 19 2014

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.89.114504

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Bailey, J. A., Bazavov, A., Bernard, C., Bouchard, C. M., Detar, C., Du, D., El-Khadra, A. X., Foley, J., Freeland, E. D., Gámiz, E., Gottlieb, S., Heller, U. M., Kronfeld, A. S., Laiho, J., Levkova, L., MacKenzie, P. B., Neil, E. T., Qiu, S. W., Simone, J., ... Zhou, R. (2014). Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al. Physical Review D - Particles, Fields, Gravitation and Cosmology, 89(11), Article 114504. https://doi.org/10.1103/PhysRevD.89.114504

Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al. / Bailey, Jon A.; Bazavov, A.; Bernard, C. et al.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 89, No. 11, 114504, 19.06.2014.

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

Bailey, JA, Bazavov, A, Bernard, C, Bouchard, CM, Detar, C, Du, D, El-Khadra, AX, Foley, J, Freeland, ED, Gámiz, E, Gottlieb, S, Heller, UM, Kronfeld, AS, Laiho, J, Levkova, L, MacKenzie, PB, Neil, ET, Qiu, SW, Simone, J, Sugar, R, Toussaint, D, Van De Water, RS & Zhou, R 2014, 'Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al.', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 89, no. 11, 114504. https://doi.org/10.1103/PhysRevD.89.114504

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title = "Update of |Vcb | from the B{\= } →d* ν{\= } form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al.",

abstract = "We compute the zero-recoil form factor for the semileptonic decay {\=B}0→D*+-{\=ν} (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC asqtad configurations), and the Fermilab action for the heavy quarks. Our calculations incorporate higher statistics, finer lattice spacings, and lighter quark masses than our 2008 work. As a byproduct of tuning the new data set, we obtain the Ds and Bs hyperfine splittings with few-MeV accuracy. For the zero-recoil form factor, we obtain F(1)=0.906(4)(12), where the first error is statistical and the second is the sum in quadrature of all systematic errors. With the latest Heavy Flavor Averaging Group average of experimental results and a cautious treatment of QED effects, we find |Vcb|=(39.04±0.49expt±0. 53QCD±0.19QED)×10-3. The QCD error is now commensurate with the experimental error.",

author = "Bailey, {Jon A.} and A. Bazavov and C. Bernard and Bouchard, {C. M.} and C. Detar and Daping Du and El-Khadra, {A. X.} and J. Foley and Freeland, {E. D.} and E. G{\'a}miz and Steven Gottlieb and Heller, {U. M.} and Kronfeld, {A. S.} and J. Laiho and L. Levkova and MacKenzie, {P. B.} and Neil, {E. T.} and Qiu, {Si Wei} and J. Simone and R. Sugar and D. Toussaint and {Van De Water}, {R. S.} and Ran Zhou",

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doi = "10.1103/PhysRevD.89.114504",

language = "English (US)",

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AU - Bailey, Jon A.

AU - Bazavov, A.

AU - Bernard, C.

AU - Bouchard, C. M.

AU - Detar, C.

AU - Du, Daping

AU - El-Khadra, A. X.

AU - Foley, J.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - MacKenzie, P. B.

AU - Neil, E. T.

AU - Qiu, Si Wei

AU - Simone, J.

AU - Sugar, R.

AU - Toussaint, D.

AU - Van De Water, R. S.

AU - Zhou, Ran

PY - 2014/6/19

Y1 - 2014/6/19

N2 - We compute the zero-recoil form factor for the semileptonic decay B̄0→D*+-ν̄ (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC asqtad configurations), and the Fermilab action for the heavy quarks. Our calculations incorporate higher statistics, finer lattice spacings, and lighter quark masses than our 2008 work. As a byproduct of tuning the new data set, we obtain the Ds and Bs hyperfine splittings with few-MeV accuracy. For the zero-recoil form factor, we obtain F(1)=0.906(4)(12), where the first error is statistical and the second is the sum in quadrature of all systematic errors. With the latest Heavy Flavor Averaging Group average of experimental results and a cautious treatment of QED effects, we find |Vcb|=(39.04±0.49expt±0. 53QCD±0.19QED)×10-3. The QCD error is now commensurate with the experimental error.

AB - We compute the zero-recoil form factor for the semileptonic decay B̄0→D*+-ν̄ (and modes related by isospin and charge conjugation) using lattice QCD with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC asqtad configurations), and the Fermilab action for the heavy quarks. Our calculations incorporate higher statistics, finer lattice spacings, and lighter quark masses than our 2008 work. As a byproduct of tuning the new data set, we obtain the Ds and Bs hyperfine splittings with few-MeV accuracy. For the zero-recoil form factor, we obtain F(1)=0.906(4)(12), where the first error is statistical and the second is the sum in quadrature of all systematic errors. With the latest Heavy Flavor Averaging Group average of experimental results and a cautious treatment of QED effects, we find |Vcb|=(39.04±0.49expt±0. 53QCD±0.19QED)×10-3. The QCD error is now commensurate with the experimental error.

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Update of |Vcb | from the B ̄ →d* ν ̄ form factor at zero recoil with three-flavor lattice QCD UPDATE of |Vcb | from the ... JON A. BAILEY et al.

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