PoS - Proceedings of Science
Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Weak Decay and Matrix Elements
Decay constants $f_B$ and $f_{B_s}$ and quark masses $m_b$ and $m_c$ 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, S. Gottlieb, U.M. Heller, A.S. Kronfeld, J. Laiho, P.B. Mackenzie, C. Monahan, H. Na, E.T. Neil, J.N. Simone, R.L. Sugar, D. Toussaint, A. Vairo, R.S. Van~de~Water Fermilab Lattice, MILC and TUMQCD Collaborations
*corresponding author
Full text: pdf
Pre-published on: December 27, 2016
Published on: March 24, 2017
We present a progress report on our calculation of the decay constants
$f_B$ and $f_{B_s}$ 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.
DOI: https://doi.org/10.22323/1.256.0294
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