Neutral $B$-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the $SU(3)$-breaking ratio $\xi$
Loading...
If you need an accessible version of this item, please email your request to iusw@iu.edu so that they may create one and provide it to you.
Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Permanent Link
Abstract
We study $SU(3)$-breaking effects in the neutral $B_{d}-\overline{B}_{d}$ and $B_{s}-\overline{B}_{s}$ 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 $\xi=f_{B_{s}}\sqrt{B_{B_{s}}}/f_{B_{d}}\sqrt{B_{B_{d}}}=1.268 \pm 0.063$. We also present results for the ratio of bag parameters $B_{B_{s}}/B_{B_{d}}$ and the ratio of Cabibbo-Kobayashi-Maskawa matrix elements $|V_{td}|/|V_{ts}|$. Although we focus on the calculation of $\xi$, the strategy and techniques described here will be employed in future extended studies of the $B$ mixing parameters $\vartriangle M_{d,s}$ and $\vartriangle\Gamma_{d,s}$ in the standard model and beyond.
Description
Keywords
Citation
Bazavov, A., Bernard, C., Bouchard, C. M., Detar, C., Di Pierro, M., El-Khadra, A. X., . . . Van De Water, R. S. (2012). Neutral $B$-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the $SU(3)$-breaking ratio $\xi$. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(3), 034503. http://dx.doi.org/10.1103/PhysRevD.86.034503
DOI
Link(s) to data and video for this item
Relation
Rights
© 2012 American Physical Society
Type
Article