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arXiv · 2112.13775

$B\!\to\!D^{(*)}\ellν$ semileptonic decays in lattice QCD with domain-wall heavy quarks

T. Kaneko·Y. Aoki·B. Colquhoun·M. Faur·H. Fukaya·S. Hashimoto·J. Koponen·E. Kou
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Abstract

We calculate the $B \to D^{(*)} \ell ν$ form factors in 2+1 flavor relativistic lattice QCD by employing the Möbius 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.

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T. Kaneko, Y. Aoki, B. Colquhoun, M. Faur, H. Fukaya, S. Hashimoto, J. Koponen, E. Kou. 2021-12-27. $B\!\to\!D^{(*)}\ellν$ semileptonic decays in lattice QCD with domain-wall heavy quarks. https://arxiv.org/abs/2112.13775

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