Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD

A. Bazavov, C. Bernard, C. M. Bouchard, C. C. Chang, C. Detar, D. Du, A. X. El-Khadra, E. D. Freeland, E. Gámiz, Steven Gottlieb, U. M. Heller, A. S. Kronfeld, J. Laiho, P. B. Mackenzie, E. T. Neil, J. N. Simone, R. Sugar, William D Toussaint, R. S. Van De Water, R. Zhou

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Abstract

We calculate in three-flavor lattice QCD the short-distance hadronic matrix elements of all five ΔC=2 four-fermion operators that contribute to neutral D-meson mixing both in and beyond the Standard Model. We use the MILC Collaboration's Nf=2+1 lattice gauge-field configurations generated with asqtad-improved staggered sea quarks. We also employ the asqtad action for the valence light quarks and use the clover action with the Fermilab interpretation for the charm quark. We analyze a large set of ensembles with pions as light as Mπ≈180 MeV and lattice spacings as fine as a≈0.045 fm, thereby enabling good control over the extrapolation to the physical pion mass and continuum limit. We obtain for the matrix elements in the MS̄-NDR scheme using the choice of evanescent operators proposed by Beneke et al., evaluated at 3 GeV, D0|Oi|D̄0={0.0805(55)(16),-0.1561(70)(31),0.0464(31)(9),0.2747(129)(55),0.1035(71)(21)} GeV4 (i=1-5). The errors shown are from statistics and lattice systematics, and the omission of charmed sea quarks, respectively. To illustrate the utility of our matrix-element results, we place bounds on the scale of CP-violating new physics in D0 mixing, finding lower limits of about 10-50×103 TeV for couplings of O(1). To enable our results to be employed in more sophisticated or model-specific phenomenological studies, we provide the correlations among our matrix-element results. For convenience, we also present numerical results in the other commonly used scheme of Buras, Misiak, and Urban.

Original languageEnglish (US)
Article number034513
JournalPhysical Review D
Volume97
Issue number3
DOIs
StatePublished - Feb 1 2018

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mesons
quantum chromodynamics
quarks
matrices
pions
operators
extrapolation
fermions
spacing
statistics
continuums
valence
physics
configurations

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Bazavov, A., Bernard, C., Bouchard, C. M., Chang, C. C., Detar, C., Du, D., ... Zhou, R. (2018). Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD. Physical Review D, 97(3), [034513]. https://doi.org/10.1103/PhysRevD.97.034513

Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD. / Bazavov, A.; Bernard, C.; Bouchard, C. M.; Chang, C. C.; Detar, C.; Du, D.; El-Khadra, A. X.; Freeland, E. D.; Gámiz, E.; Gottlieb, Steven; Heller, U. M.; Kronfeld, A. S.; Laiho, J.; Mackenzie, P. B.; Neil, E. T.; Simone, J. N.; Sugar, R.; Toussaint, William D; Van De Water, R. S.; Zhou, R.

In: Physical Review D, Vol. 97, No. 3, 034513, 01.02.2018.

Research output: Contribution to journalArticle

Bazavov, A, Bernard, C, Bouchard, CM, Chang, CC, Detar, C, Du, D, El-Khadra, AX, Freeland, ED, Gámiz, E, Gottlieb, S, Heller, UM, Kronfeld, AS, Laiho, J, Mackenzie, PB, Neil, ET, Simone, JN, Sugar, R, Toussaint, WD, Van De Water, RS & Zhou, R 2018, 'Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD', Physical Review D, vol. 97, no. 3, 034513. https://doi.org/10.1103/PhysRevD.97.034513
Bazavov A, Bernard C, Bouchard CM, Chang CC, Detar C, Du D et al. Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD. Physical Review D. 2018 Feb 1;97(3). 034513. https://doi.org/10.1103/PhysRevD.97.034513
Bazavov, A. ; Bernard, C. ; Bouchard, C. M. ; Chang, C. C. ; Detar, C. ; Du, D. ; El-Khadra, A. X. ; Freeland, E. D. ; Gámiz, E. ; Gottlieb, Steven ; Heller, U. M. ; Kronfeld, A. S. ; Laiho, J. ; Mackenzie, P. B. ; Neil, E. T. ; Simone, J. N. ; Sugar, R. ; Toussaint, William D ; Van De Water, R. S. ; Zhou, R. / Short-distance matrix elements for D 0 -meson mixing from N f = 2 + 1 lattice QCD. In: Physical Review D. 2018 ; Vol. 97, No. 3.
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AU - Chang, C. C.

AU - Detar, C.

AU - Du, D.

AU - El-Khadra, A. X.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Mackenzie, P. B.

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