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Semileptonic decays $B\rightarrow D^{(*)}lν$ at nonzero recoil

We have analyzed the semileptonic decays $B\rightarrow D\ellν$ and $B\rightarrow D^*\ellν$ on the full suite of MILC (2+1)-flavor asqtad ensembles with lattice spacings as small as 0.045 fm and light-to-strange-quark mass ratios as low as 1/20. We use the Fermilab interpretation of the clover action for heavy valence quarks and the asqtad action for light valence quarks. We compute the hadronic form factors for $B\rightarrow D$ at both zero and nonzero recoil and for $B\rightarrow D^*$ at zero recoil. We report our results for $|V_{cb}|$.

preprint2013arXivOpen access
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