Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ

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.86.034503

Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ

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

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

32 Scopus citations

Abstract

We study SU(3)-breaking effects in the neutral B _d-B _̄d and B _s-B _̄s systems with unquenched N _f=2+1 lattice quantum chromodynamics (QCD). We calculate the relevant matrix elements on the MILC collaboration's gauge configurations with asqtad-improved staggered sea quarks. For the valence light-quarks (u, d, and s) we use the asqtad action, while for b quarks we use the Fermilab action. We obtain ξ=f _Bs√B _Bsf _Bd√B _Bd=1.268±0.063. We also present results for the ratio of bag parameters B _BsB _Bd and the ratio of Cabibbo-Kobayashi- Maskawa matrix elements |V _td|/|V _ts|. Although we focus on the calculation of ξ, the strategy and techniques described here will be employed in future extended studies of the B mixing parameters ΔM _d,s and ΔΓ _d,s in the standard model and beyond.

Original language	English (US)
Article number	034503
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	86
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.86.034503
State	Published - Aug 14 2012
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.86.034503

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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). Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(3), Article 034503. https://doi.org/10.1103/PhysRevD.86.034503

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, 'Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 86, no. 3, 034503. https://doi.org/10.1103/PhysRevD.86.034503

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title = "Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ",

abstract = "We study SU(3)-breaking effects in the neutral B d-B{\= }d and B s-B{\= }s systems with unquenched N f=2+1 lattice quantum chromodynamics (QCD). We calculate the relevant matrix elements on the MILC collaboration's gauge configurations with asqtad-improved staggered sea quarks. For the valence light-quarks (u, d, and s) we use the asqtad action, while for b quarks we use the Fermilab action. We obtain ξ=f Bs√B Bsf Bd√B Bd=1.268±0.063. We also present results for the ratio of bag parameters B BsB Bd and the ratio of Cabibbo-Kobayashi- Maskawa matrix elements |V td|/|V ts|. Although we focus on the calculation of ξ, the strategy and techniques described here will be employed in future extended studies of the B mixing parameters ΔM d,s and ΔΓ d,s in the standard model and beyond.",

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.\}",

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month = aug,

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doi = "10.1103/PhysRevD.86.034503",

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T1 - Neutral B-meson mixing from three-flavor lattice quantum chromodynamics

T2 - Determination of the SU(3)-breaking ratio ξ

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 - 2012/8/14

Y1 - 2012/8/14

N2 - We study SU(3)-breaking effects in the neutral B d-B ̄d and B s-B ̄s systems with unquenched N f=2+1 lattice quantum chromodynamics (QCD). We calculate the relevant matrix elements on the MILC collaboration's gauge configurations with asqtad-improved staggered sea quarks. For the valence light-quarks (u, d, and s) we use the asqtad action, while for b quarks we use the Fermilab action. We obtain ξ=f Bs√B Bsf Bd√B Bd=1.268±0.063. We also present results for the ratio of bag parameters B BsB Bd and the ratio of Cabibbo-Kobayashi- Maskawa matrix elements |V td|/|V ts|. Although we focus on the calculation of ξ, the strategy and techniques described here will be employed in future extended studies of the B mixing parameters ΔM d,s and ΔΓ d,s in the standard model and beyond.

AB - We study SU(3)-breaking effects in the neutral B d-B ̄d and B s-B ̄s systems with unquenched N f=2+1 lattice quantum chromodynamics (QCD). We calculate the relevant matrix elements on the MILC collaboration's gauge configurations with asqtad-improved staggered sea quarks. For the valence light-quarks (u, d, and s) we use the asqtad action, while for b quarks we use the Fermilab action. We obtain ξ=f Bs√B Bsf Bd√B Bd=1.268±0.063. We also present results for the ratio of bag parameters B BsB Bd and the ratio of Cabibbo-Kobayashi- Maskawa matrix elements |V td|/|V ts|. Although we focus on the calculation of ξ, the strategy and techniques described here will be employed in future extended studies of the B mixing parameters ΔM d,s and ΔΓ d,s in the standard model and beyond.

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IS - 3

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ER -

Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ

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