Speaker
Dr
James Simone
(Fermilab)
Description
We compute hadronic matrix elements for neutral $B$-meson mixing in
the Standard Model and beyond as well as the corresponding operators
for the the short-distance contribution to $D$-meson mixing. On the
same sets of gauge ensembles, we calculate the leptonic decay
constants for the $B$- and $D$-meson systems. The matrix elements are
computed with asqtad light quarks and clover heavy quarks in the
Fermilab interpretation. We use the MILC asqtad gauge ensembles at
four lattice spacings between $0.11$ fm and $0.043$ fm. We
review the the matrix element calculations and report on
the determination of the bag parameters. The bag parameters are
computed by combining the mixing matrix elements and the decay
constant results in a bootstrap process which accounts for
correlations from both statistics and the dominant systematic errors.
Some systematic effects, such as discretization errors, and quark mass
tunings, tend to cancel in ratios.
Primary author
Dr
James Simone
(Fermilab)
Co-authors
Dr
Aida El-Khadra
(University of Illinois)
Dr
Andreas Kronfeld
(Fermilab)
Dr
Chia Cheng Chang
(University of Illinois)
Dr
Chris Bouchard
(College of William and Mary)
Dr
Elizabeth Freeland
(School of the Art Institute of Chicago)
Dr
Elvira Gamiz
(CAFPE and Departamento de Fisica Teórica y del Cosmos, Universidad de Granada)
Dr
Ethan Neil
(5Department of Physics, University of Colorado, Boulder and 7RIKEN-BNL Research Center)
