@article{713fa0e268894820bfe2539dd59cd9c6,
title = "Neutral B mixing from 2+1 flavor lattice QCD",
abstract = "We present an update of the Fermilab-MILC Collaboration's calculation of hadronic matrix elements for B0-B-0 mixing. This work is a more extended analysis than our recent publication of the SU(3)-breaking ratio x [1]. We use the asqtad staggered action for light valence quarks in combination with the Fermilab interpretation of the Sheikoleslami-Wohlert action for heavy quarks. The calculations use MILC's 2+1 flavor asqtad ensembles. Ensembles include four lattice spacings from approximately 0.125 fm to 0.045 fm and up/down to strange quark mass ratios as low as 0.05. Our calculation covers the complete set of five operators needed to describe B mixing in the Standard Model and beyond. In addition to an update including a fuller set of analyzed data, we comment on the form of the staggered cPT extrapolation function.",
author = "Freeland, {E. D.} and Bouchard, {C. M.} and C. Bernard and El-Khadra, {A. X.} and E. G{\'a}miz and Kronfeld, {A. S.} and J. Laiho and {Van De Water}, {R. S.}",
note = "Funding Information: Computations for this work were carried out with resources provided by the USQCD Collaboration, the Argonne Leadership Computing Facility, the National Energy Research Scientific Computing Center, and the Los Alamos National Laboratory, which are funded by the Office of Science of the U.S. Department of Energy; and with resources provided by the National Institute for Computational Science, the Pittsburgh Supercomputer Center, the San Diego Supercomputer Center, and the Texas Advanced Computing Center, which are funded through the National Science Foundation{\textquoteright}s Teragrid/XSEDE Program. This work was supported in part by the U.S. Department of Energy under Grants No. DE-FG02-91ER40677 (C.M.B, E.D.F., A.X.K.) and No. DE-FG02-91ER40628 (C.B.), and by the Fermilab Fellowship in Theoretical Physics (C.M.B.). This work was supported in part by the MICINN (Spain) under grant FPA2010-16696 and Ram{\'o}n y Cajal program (E.G.), Junta de Andaluc{\'i}a (Spain) under grants FQM-101, FQM-330, and FQM-6552 (E.G.), European Commission under Grant No. PCIG10-GA-2011-303781 (E.G.) Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.; 30th International Symposium on Lattice Field Theory, Lattice 2012 ; Conference date: 24-06-2012 Through 29-06-2012",
year = "2012",
language = "English (US)",
volume = "Part F130497",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",
}