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arxiv: 1901.00216 · v1 · pith:VWSM5ZU3new · submitted 2019-01-01 · ✦ hep-lat · hep-ex· hep-ph

Bto D^astellν at non-zero recoil

classification ✦ hep-lat hep-exhep-ph
keywords quarksactionanalysisasqtadnon-zerorecoilresultsapprox
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We present preliminary blinded results from our analysis of the form factors for $B\rightarrow D^\ast\ell\nu$ 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 $R(D^\ast)$.

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  1. Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast)}\ell\overline{\nu}$ decay modes

    hep-ph 2019-07 unverdicted novelty 5.0

    Angular observables in B→D(*)ℓν decays can distinguish Lorentz structures of new physics contributions fitted to measured R(D(*)) ratios, even when those ratios agree with the Standard Model.