$B \to D^{(*)}\ell\nu$ semileptonic decays in lattice QCD with domain-wall heavy quarks
T. Kaneko*,
Y. Aoki,
B. Colquhoun,
M. Faur,
H. Fukaya,
S. Hashimoto,
J. Koponen and
E. Kou*: corresponding author
Pre-published on:
May 16, 2022
Published on:
July 08, 2022
Abstract
We calculate the $B\!\to\!D^{(*)}\ell\nu$ form factors in 2+1 flavor
relativistic lattice QCD by employing the Moebius domain-wall action
for all quark flavors.
Our simulations are carried out at lattice cut-offs $a^{-1} \sim 2.5$,
3.6 and 4.5 GeV with the bottom quark masses up to 0.7 $a^{-1}$
to control discretization effects.
We extrapolate the form factors to the continuum limit and
physical quark masses, and discuss systematic uncertainties
of the form factors.
DOI: https://doi.org/10.22323/1.396.0561
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