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We report on our on-going study of the Bₛ → Kν decay in Nf=2+1 lattice QCD. We employ fully relativistic setup in which the Möbius domain-wall action is used for all quark flavors. The lattice cutoff is a⁻¹ ~ 2.5 GeV, where we take bottom quark masses up to mQ\!<\!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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Mohanta et al. (2024) studied this question.
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