Neutral B-meson and D-meson mixing matrix elements from 2+1 flavor lattice QCD

C. Bernard; C. M. Bouchard; C. C. Chang; A. X. El-Khadra; E. D. Freelandd; E. Gámiz; A. S. Kronfeld; J. Laiho; P. B. Mackenzie; E. T. Nei; J. N. Simone; R. S. Van De Water

Neutral B-meson and D-meson mixing matrix elements from 2+1 flavor lattice QCD

C. Bernard, C. M. Bouchard, C. C. Chang, A. X. El-Khadra, E. D. Freelandd, E. Gámiz, A. S. Kronfeld, J. Laiho, P. B. Mackenzie, E. T. Nei, J. N. Simone, R. S. Van De Water

Department of Physics

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

Abstract

We compute the hadronic matrix elements of the complete set of local four-quark operators relevant for neutral B-meson mixing in the Standard Model and beyond as well as for the the shortdistance contributions to D⁰ mixing. In addition we calculate the leptonic decay constants for the B-And D-meson systems on the same sets of gauge-field ensembles. Both mixing matrix elements and decay constants are computed with asqtad-improved light quarks and clover heavy quarks in the Fermilab interpretation. We use the MILC three-flavor asqtad ensembles at four lattice spacings between appoximately 0:11 fm and 0:043 fm. We present nearly final values for the mixing matrix elements, and find for the SU(3) breaking ratio ξ = 1:203(17)(6)_sea_c . The second error accounts for the omission of charm quarks in the sea while the first error includes all other sources of uncertainty. Our result for ξ when combined with the experimentally measured frequencies gives jV_tdj /V_ts/ = 0:2047(4)_exp(29)th(10)_sea_c. Finally, we report on our progress towards finalizing our decay constant and bag parameter analyses.

Original language	English (US)
Article number	332
Journal	Proceedings of Science
Volume	14-18-July-2015
State	Published - 2015
Event	33rd International Symposium on Lattice Field Theory, LATTICE 2015 - Kobe, Japan Duration: Jul 14 2015 → Jul 18 2015

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@article{8b60907c891942f7af07d5dd8df8cedd,

title = "Neutral B-meson and D-meson mixing matrix elements from 2+1 flavor lattice QCD",

abstract = "We compute the hadronic matrix elements of the complete set of local four-quark operators relevant for neutral B-meson mixing in the Standard Model and beyond as well as for the the shortdistance contributions to D0 mixing. In addition we calculate the leptonic decay constants for the B-And D-meson systems on the same sets of gauge-field ensembles. Both mixing matrix elements and decay constants are computed with asqtad-improved light quarks and clover heavy quarks in the Fermilab interpretation. We use the MILC three-flavor asqtad ensembles at four lattice spacings between appoximately 0:11 fm and 0:043 fm. We present nearly final values for the mixing matrix elements, and find for the SU(3) breaking ratio ξ = 1:203(17)(6)seac . The second error accounts for the omission of charm quarks in the sea while the first error includes all other sources of uncertainty. Our result for ξ when combined with the experimentally measured frequencies gives jVtdj /Vts/ = 0:2047(4)exp(29)th(10)seac. Finally, we report on our progress towards finalizing our decay constant and bag parameter analyses.",

author = "C. Bernard and Bouchard, {C. M.} and Chang, {C. C.} and El-Khadra, {A. X.} and Freelandd, {E. D.} and E. G{\'a}miz and Kronfeld, {A. S.} and J. Laiho and Mackenzie, {P. B.} and Nei, {E. T.} and Simone, {J. N.} and {Van De Water}, {R. S.}",

year = "2015",

language = "English (US)",

volume = "14-18-July-2015",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

note = "33rd International Symposium on Lattice Field Theory, LATTICE 2015 ; Conference date: 14-07-2015 Through 18-07-2015",

}

TY - JOUR

T1 - Neutral B-meson and D-meson mixing matrix elements from 2+1 flavor lattice QCD

AU - Bernard, C.

AU - Bouchard, C. M.

AU - Chang, C. C.

AU - El-Khadra, A. X.

AU - Freelandd, E. D.

AU - Gámiz, E.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Mackenzie, P. B.

AU - Nei, E. T.

AU - Simone, J. N.

AU - Van De Water, R. S.

PY - 2015

Y1 - 2015

N2 - We compute the hadronic matrix elements of the complete set of local four-quark operators relevant for neutral B-meson mixing in the Standard Model and beyond as well as for the the shortdistance contributions to D0 mixing. In addition we calculate the leptonic decay constants for the B-And D-meson systems on the same sets of gauge-field ensembles. Both mixing matrix elements and decay constants are computed with asqtad-improved light quarks and clover heavy quarks in the Fermilab interpretation. We use the MILC three-flavor asqtad ensembles at four lattice spacings between appoximately 0:11 fm and 0:043 fm. We present nearly final values for the mixing matrix elements, and find for the SU(3) breaking ratio ξ = 1:203(17)(6)seac . The second error accounts for the omission of charm quarks in the sea while the first error includes all other sources of uncertainty. Our result for ξ when combined with the experimentally measured frequencies gives jVtdj /Vts/ = 0:2047(4)exp(29)th(10)seac. Finally, we report on our progress towards finalizing our decay constant and bag parameter analyses.

AB - We compute the hadronic matrix elements of the complete set of local four-quark operators relevant for neutral B-meson mixing in the Standard Model and beyond as well as for the the shortdistance contributions to D0 mixing. In addition we calculate the leptonic decay constants for the B-And D-meson systems on the same sets of gauge-field ensembles. Both mixing matrix elements and decay constants are computed with asqtad-improved light quarks and clover heavy quarks in the Fermilab interpretation. We use the MILC three-flavor asqtad ensembles at four lattice spacings between appoximately 0:11 fm and 0:043 fm. We present nearly final values for the mixing matrix elements, and find for the SU(3) breaking ratio ξ = 1:203(17)(6)seac . The second error accounts for the omission of charm quarks in the sea while the first error includes all other sources of uncertainty. Our result for ξ when combined with the experimentally measured frequencies gives jVtdj /Vts/ = 0:2047(4)exp(29)th(10)seac. Finally, we report on our progress towards finalizing our decay constant and bag parameter analyses.

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M3 - Conference Article

AN - SCOPUS:84988624756

SN - 1824-8039

VL - 14-18-July-2015

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 332

T2 - 33rd International Symposium on Lattice Field Theory, LATTICE 2015

Y2 - 14 July 2015 through 18 July 2015

ER -

Neutral B-meson and D-meson mixing matrix elements from 2+1 flavor lattice QCD

Abstract

ASJC Scopus subject areas

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