Form factors for semileptonic B-decays with HISQ light quarks and clover b-quarks in Fermilab interpretation Article Swipe

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Physics Particle physics Fermilab Quark B meson Semileptonic decay Nuclear physics Scalar (mathematics) Lepton Electron Mathematics Geometry

Hwancheol Jeong , Carleton DeTar , A. X. El-Khadra , E. Gámiz , Zechariah Gelzer , Steven Gottlieb , William I. Jay , Andreas S. Kronfeld , Andrew Lytle , Alejandro Vaquero ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2402.14924 · OA: W4392181785

We compute the vector, scalar, and tensor form factors for the $B\to π$, $B\to K$, and $B_s\to K$ amplitudes, which are needed to describe semileptonic $B$-meson decay rates for both the charged and neutral current cases. We use the highly improved staggered quark (HISQ) action for the sea and light valence quarks. The bottom quark is described by the clover action in the Fermilab interpretation. Simulations are carried out on $N_f = 2+1+1$ MILC HISQ ensembles at approximate lattice spacings from $0.15$ fm down to $0.057$ fm. We present blinded preliminary results for the form factors.