B s→D s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ +μ -)

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; Jongjeong Kim; A. S. Kronfeld; J. Laiho; L. Levkova; P. B. MacKenzie; Y. Meurice; E. Neil; M. B. Oktay; Si Wei Qiu; J. N. Simone; R. Sugar; D. Toussaint; R. S. Van De Water; Ran Zhou

doi:10.1103/PhysRevD.85.114502

B _s→D _s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ ⁺μ ^-)

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
, Jongjeong Kim
, A. S. Kronfeld
, J. Laiho
, L. Levkova
, P. B. MacKenzie
, Y. Meurice
, E. Neil
, M. B. Oktay

Si Wei Qiu, J. N. Simone, R. Sugar, D. Toussaint, R. S. Van De Water, Ran Zhou

Physics

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

68 Scopus citations

Abstract

We calculate form-factor ratios between the semileptonic decays B ^̄0→D ^+-ν̄ and B̄s0→Ds+ ^-ν̄ with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of neutral B decays, which are needed for measurements of BR(Bs0→μ ⁺μ ^-). We use the MILC ensembles of gauge configurations with 2+1 flavors of sea-quarks at two s of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate our simulation results at small recoil toward maximum recoil. Our results for the form-factor ratios are f0(s)(Mπ2)/f0(d)(MK2)=1.046(44) _stat(15) _syst and f0(s)(Mπ2)/f0(d)(Mπ2)=1.054(47) _stat(17) _syst. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d↔s) symmetry is observed.

Original language	English (US)
Article number	114502
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	85
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.85.114502
State	Published - Jun 4 2012

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.85.114502

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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., Kim, J., Kronfeld, A. S., Laiho, J., Levkova, L., MacKenzie, P. B., Meurice, Y., Neil, E., ... Zhou, R. (2012). B _s→D _s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ ⁺μ ^-). Physical Review D - Particles, Fields, Gravitation and Cosmology, 85(11), Article 114502. https://doi.org/10.1103/PhysRevD.85.114502

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, Kim, J, Kronfeld, AS, Laiho, J, Levkova, L, MacKenzie, PB, Meurice, Y, Neil, E, Oktay, MB, Qiu, SW, Simone, JN, Sugar, R, Toussaint, D, Van De Water, RS & Zhou, R 2012, 'B _s→D _s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ ⁺μ ^-)', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 85, no. 11, 114502. https://doi.org/10.1103/PhysRevD.85.114502

@article{69b3e5cfe7d84b2cb164da828c3ba689,

title = "B s→D s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ +μ -)",

abstract = "We calculate form-factor ratios between the semileptonic decays B{\= }0→D +-{\=ν} and {\=B}s0→Ds+ -{\=ν} with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of neutral B decays, which are needed for measurements of BR(Bs0→μ +μ -). We use the MILC ensembles of gauge configurations with 2+1 flavors of sea-quarks at two s of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate our simulation results at small recoil toward maximum recoil. Our results for the form-factor ratios are f0(s)(Mπ2)/f0(d)(MK2)=1.046(44) stat(15) syst and f0(s)(Mπ2)/f0(d)(Mπ2)=1.054(47) stat(17) syst. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d↔s) symmetry is observed.",

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 Jongjeong Kim and Kronfeld, \{A. S.\} and J. Laiho and L. Levkova and MacKenzie, \{P. B.\} and Y. Meurice and E. Neil and Oktay, \{M. B.\} and Qiu, \{Si Wei\} and Simone, \{J. N.\} and R. Sugar and D. Toussaint and \{Van De Water\}, \{R. S.\} and Ran Zhou",

year = "2012",

month = jun,

day = "4",

doi = "10.1103/PhysRevD.85.114502",

language = "English (US)",

volume = "85",

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

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publisher = "American Physical Society",

number = "11",

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TY - JOUR

T1 - B s→D s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ +μ -)

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 - Kim, Jongjeong

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - MacKenzie, P. B.

AU - Meurice, Y.

AU - Neil, E.

AU - Oktay, M. B.

AU - Qiu, Si Wei

AU - Simone, J. N.

AU - Sugar, R.

AU - Toussaint, D.

AU - Van De Water, R. S.

AU - Zhou, Ran

PY - 2012/6/4

Y1 - 2012/6/4

N2 - We calculate form-factor ratios between the semileptonic decays B ̄0→D +-ν̄ and B̄s0→Ds+ -ν̄ with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of neutral B decays, which are needed for measurements of BR(Bs0→μ +μ -). We use the MILC ensembles of gauge configurations with 2+1 flavors of sea-quarks at two s of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate our simulation results at small recoil toward maximum recoil. Our results for the form-factor ratios are f0(s)(Mπ2)/f0(d)(MK2)=1.046(44) stat(15) syst and f0(s)(Mπ2)/f0(d)(Mπ2)=1.054(47) stat(17) syst. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d↔s) symmetry is observed.

AB - We calculate form-factor ratios between the semileptonic decays B ̄0→D +-ν̄ and B̄s0→Ds+ -ν̄ with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of neutral B decays, which are needed for measurements of BR(Bs0→μ +μ -). We use the MILC ensembles of gauge configurations with 2+1 flavors of sea-quarks at two s of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate our simulation results at small recoil toward maximum recoil. Our results for the form-factor ratios are f0(s)(Mπ2)/f0(d)(MK2)=1.046(44) stat(15) syst and f0(s)(Mπ2)/f0(d)(Mπ2)=1.054(47) stat(17) syst. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d↔s) symmetry is observed.

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UR - https://www.scopus.com/pages/publications/84862275903#tab=citedBy

U2 - 10.1103/PhysRevD.85.114502

DO - 10.1103/PhysRevD.85.114502

M3 - Article

AN - SCOPUS:84862275903

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 - 114502

ER -

B _s→D _s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ ⁺μ ^-)

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