High-precision lattice calculation of the decay constants $f_B$ and $f_{B_s}$

ORAL

Abstract

We present preliminary, high-precision results for the hadronic decay constants of the $B$ and the $B_s$ mesons from lattice QCD simulations using a highly improved quark formulation for both heavy and light valence quarks. Calculations are carried out with several heavy valence-quark masses on lattice ensembles with 2+1+1 flavors of HISQ sea quarks at five lattice spacings and three light sea quark mass ratios $m_{ud}/m_s$, including approximately physical sea quark masses. This range of parameters provides excellent control of the continuum limit and of heavy-quark discretization errors.

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Authors

  • Carleton DeTar

    • Univ of Utah
    • University of Utah

  • Alexei Bazavov

    • Indiana University

  • Claude Bernard

    • Washington University

  • Christopher Bouchard

    • College of William and Mary

  • Nathan Brown

    • Washington University

  • Daping Du

    • Syracuse University

  • Aida El Khadra

    • University of Illinois

  • Elizabeth Freeland

    • School of the Art Insitute of Chicago

  • Elvira Gamiz

    • Universidad de Granada

  • Steven Gottlieb

    • Indiana University

  • Heechang Na

    • University of Utah

  • Urs Heller

    • American Physical Society

  • Javad Komijani

    • Technische Universitaet Muenchen

  • Andreas Kronfeld

    • Fermilab

  • John Laiho

    • Syracuse University

  • Paul Mackenzie

    • Fermilab

  • Ethan Neil

    • University of Colorado

  • James Simone

    • Fermilab

  • Robert Sugar

    • University of California, Santa Barbara

  • Douglas Toussaint

    • University of Arizona

  • Ruth Van de Water

    • Fermilab

  • Ran Zhou

    • Fermilab