PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Weak Decays and Matrix Elements
$B\rightarrow D^\ast\ell\nu$ at non-zero recoil
A. Vaquero*, C. DeTar, A.X. El-Khadra, A. Kronfeld, J. Laiho, R. Van de Water  on behalf of Fermilab Lattice and MILC Collaborations
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Published on: May 29, 2019
We present preliminary blinded results from our analysis of the form factors for $B\to D^\ast\ell\nu$ decay at non-zero 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 $\left|V_{cb}\right|$ and $R(D\ast)$.
DOI: https://doi.org/10.22323/1.334.0282
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