Volume 363 - 37th International Symposium on Lattice Field Theory (LATTICE2019) - Main session
$B \to D^{(*)}\ell\nu$ form factors from lattice QCD with relativistic heavy quarks
T. Kaneko*, Y. Aokic, G. Bailas, B. Colquhoun, H. Fukaya, S. Hashimoto, J. Koponen  on behalf of the JLQCD Collaboration
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Pre-published on: January 04, 2020
Published on: August 27, 2020
Abstract
We report on our calculation of the $B \to D^{(*)}\ell\nu$ form factors in 2+1 flavor lattice QCD. The Moebius domain-wall action is employed for light, strange, charm and bottom quarks. At lattice cutoffs $a^{-1} \sim 2.4$, 3.6 and 4.5 GeV, we simulate bottom quark masses up to 0.7 $a^{-1}$ to control discretization errors. The pion mass is as low as 230 MeV. We extrapolate the form factors to the continuum limit and physical quark masses, and make a comparison with recent phenomenological analyses.
DOI: https://doi.org/10.22323/1.363.0139
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