Revisiting fits to B0 →d∗- ν to measure

Abstract

We present a study of fits to exclusive B0→D∗-+ν measurements for the determination of the Cabibbo-Kobayashi-Maskawa matrix element magnitude |Vcb|, based on the most recent Belle untagged measurement. Results are obtained with the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parametrizations, with and without the inclusion of preliminary lattice QCD (LQCD) measurements of form factors at nonzero hadronic recoil from the JLQCD Collaboration. The CLN and BGL fits are also studied in different scenarios with reduced theoretical assumptions and at higher-order expansions, respectively. To avoid bias from high systematic error correlations, we employ a novel techniqu..