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Calculation of $\bar B \rightarrow D^\ast \ell \bar \nu$ form factor at zero recoil using the Oktay-Kronfeld action

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arxiv 1711.01786 v2 pith:EA6SWAZX submitted 2017-11-06 hep-lat hep-ph

Jon A. Bailey , Tanmoy Bhattacharya , Rajan Gupta , Yong-Chull Jang , Weonjong Lee , Jaehoon Leem , Sungwoo Park , Boram Yoon (LANL-SWME Collaboration) This is my paper · ORCID
classification hep-lathep-ph
keywords actionquarksfactorformhisqoktay-kronfeldrecoilrightarrow
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present the first preliminary results for the semileptonic form factor $h_{A_1}(w=1)/\rho_{A_j}$ at zero recoil for the $\bar B \rightarrow D^\ast \ell \bar \nu$ decay using lattice QCD with four flavors of sea quarks. We use the HISQ staggered action for the light valence and sea quarks (the MILC HISQ configurations), and the Oktay-Kronfeld (OK) action for the heavy valence quarks.

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