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Form factors for B and B_s semileptonic decays with NRQCD/HISQ quarks · Around

2012

Form factors for B and B_s semileptonic decays with NRQCD/HISQ quarks

Bouchard, C. M., Lepage, G. Peter, Monahan, Chris J. et al.

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We discuss preliminaries of a calculation of the form factors for the semileptonic decays B -> pi lv, B_s -> K lv, and B -> K ll.

We simulate with NRQCD heavy and HISQ light valence quarks on the MILC 2+1 dynamical asqtad configurations.
The form factors are calculated over a range of momentum transfer to allow determination of their shape and the extraction of |V_ub|.
Additionally, we are calculating ratios of these form factors to those for the unphysical decay B_s -> eta_s.

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