Decay constants fB and fBs and quark masses mb and mc from HISQ simulations

J. Komijani, A. Bazavov, C. Bernard, N. Brambilla, N. Brown, 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, C. Monahan, Heechang Na, E. T. Neil, J. N. Simone, R. L. SugarD. Toussaint, A. Vairo, R. S. Van De Water

Research output: Contribution to journalConference article

Abstract

We present a progress report on our calculation of the decay constants fB and fBs from lattice- QCD simulations with highly-improved staggered quarks. Simulations are carried out with several heavy valence-quark masses on (2+1+1)-flavor ensembles that include charm sea quarks. We include data at six lattice spacings and several light sea-quark masses, including an approximately physical-mass ensemble at all but the smallest lattice spacing, 0.03 fm. This range of parameters provides excellent control of the continuum extrapolation to zero lattice spacing and of heavy-quark discretization errors. Finally, using the heavy-quark effective theory expansion we present a method of extracting from the same correlation functions the charm- and bottom-quark masses as well as some low-energy constants appearing in the heavy-quark expansion.

Original languageEnglish (US)
JournalProceedings of Science
VolumePart F128557
StatePublished - Jan 1 2016
Event34th Annual International Symposium on Lattice Field Theory, LATTICE 2016 - Southampton, United Kingdom
Duration: Jul 24 2016Jul 30 2016

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ASJC Scopus subject areas

  • General

Cite this

Komijani, J., Bazavov, A., Bernard, C., Brambilla, N., Brown, N., DeTar, C., Du, D., El-Khadra, A. X., Freeland, E. D., Gámiz, E., Gottlieb, S., Heller, U. M., Kronfeld, A. S., Laiho, J., Mackenzie, P. B., Monahan, C., Na, H., Neil, E. T., Simone, J. N., ... Van De Water, R. S. (2016). Decay constants fB and fBs and quark masses mb and mc from HISQ simulations. Proceedings of Science, Part F128557.