PoS - Proceedings of Science
Volume 363 - 37th International Symposium on Lattice Field Theory (LATTICE2019) - Main session
The $B \to D^\ast\ell\nu$ semileptonic decay at nonzero recoil and its implications for $|V_{cb}|$ and $R(D^\ast)$
A.V. Avilés-Casco,* C. DeTar, A. El-Khadra, A. Kronfeld, J. Laiho, R. Van de Water on behalf of Fermilab Lattice and MILC Collaborations
*corresponding author
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Pre-published on: January 03, 2020
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Abstract
We present preliminary results from our analysis of the form factors for $B\to D^\ast\ell\nu$ decay at nonzero recoil. Our analysis includes 15 MILC asqtad ensembles with $N_f=2+1$ flavors of sea quarks and lattice spacings ranging from $a\approx 0.15$ fm down to $0.045$ fm. The valence light quarks employ the asqtad action, whereas the $b$ and $c$ quarks are treated using the Fermilab action. We discuss the impact that our results will have on $|V_{cb}|$ and $R(D^\ast)$.
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