@article{59e24fcbbdd74e919a0d4f929682c9ad,
title = "Neutral B-meson mixing parameters in and beyond the SM with 2+1 flavor lattice QCD",
abstract = "We report on the status of our calculation of the hadronic matrix elements for neutral B-meson mixing with asqtad sea and valence light quarks and using the Wilson clover action with the Fermilab interpretation for the b quark. We calculate the matrix elements of all five local operators that contribute to neutral B-meson mixing both in and beyond the Standard Model. We use MILC ensembles with Nf = 2 + 1 dynamical flavors at four different lattice spacings in the range a ≈ 0.045-0.12 fm, and with light sea-quark masses as low as 0.05 times the physical strange quark mass. We perform a combined chiral-continuum extrapolation including the so-called wrongspin contributions in simultaneous fits to the matrix elements of the five operators. We present a complete systematic error budget and conclude with an outlook for obtaining final results from this analysis.",
author = "{Fermilab Lattice and MILC Collaborations} and Bouchard, {C. M.} and Freelandc, {E. D.} and Bernardd, {C. W.} and Chang, {C. C.} and El-Khadra, {A. X.} and G{\'a}miz, {M. E.} and Kronfeld, {A. S.} and J. Laiho and {Van De Water}, {R. S.}",
note = "Funding Information: the Universities Research Association, the MINECO, Junta de Andaluc{\'i}a, the European Commission, the German Excellence Initiative, the European Union Seventh Framework Programme, and the European Union{\textquoteright}s Marie Curie COFUND program. Computation for this work was carried out at the Argonne Leadership Computing Facility (ALCF), the National Center for Atmospheric Research (UCAR), the National Center for Supercomputing Resources (NCSA), the National Energy Resources Supercomputing Center (NERSC), the National Institute for Computational Sciences (NICS), the Texas Advanced Computing Center (TACC), and the USQCD facilities at Fermilab, under grants from the NSF and DOE. Funding Information: This work was supported by the U.S. Department of Energy, the National Science Foundation, Funding Information: ∗Speaker. †Operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy; 32nd International Symposium on Lattice Field Theory, LATTICE 2014 ; Conference date: 23-06-2014 Through 28-06-2014",
year = "2014",
language = "English (US)",
volume = "Part F130500",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",
}