B → D^(*)ℓν form factors from lattice QCD with relativistic heavy quarks

2019/12/26 by T. Kaneko, Yasumichi Aoki, Kaneko, T. +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1912.11770

openalex publication_date 2019/12/26 · openalex created_date 2020/01/10 · openalex updated_date 2026/07/28

Abstract

We report on our calculation of the B → D^(*) ℓ νform factors in 2+1 flavor lattice QCD. The Möbius domain-wall action is employed for light, strange, charm and bottom quarks. At lattice cutoffs 1/a ∼ 2.4, 3.6 and 4.5 GeV, we simulate bottom quark masses up to 0.7/a 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.

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