$B_s \to K\ell\nu$ form factors from lattice QCD with domain-wall heavy quarks

Author:

Protick Mohanta, Takashi Kaneko, Shoji Hashimoto

Keyword:

High Energy Physics - Lattice, High Energy Physics - Lattice (hep-lat)

journal:

date:

2024-01-03 00:00:00

Abstract

We report on our on-going study of the $B_s \to K\ell\nu$ decay in $N_f=2+1$ lattice QCD. We employ fully relativistic setup in which the M\"obius domain-wall action is used for all quark flavors. The lattice cutoff is $a^{-1} \sim 2.5$ GeV, where we take bottom quark masses up to $m_Q\!<\!0.7a^{-1}$ in order to control discretization errors. We present preliminary results for the relevant form factors extracted from correlator ratios by inspecting their ground state saturation.

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