Exclusive semileptonic b -> c decays at Belle
Abstract
We present analyses of exclusive semileptonic b -> c decays based on data samples collected by the Belle detector at the KEK-B e+ e- asymmetric collider. The first topic are precision measurements of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| and the HQET form factor parameters 2, R1 and R2 extracted from B+ -> D*0 + decays using untagged Upsilon(4S) events. Additionally, a test of the form factor parametrization is performed. Secondly, measurements of B -> D* τ and B -> D τ decays are presented, where the accompanying second B meson is tagged and reconstructed. Branching fractions of the semi-tauonic decays are measured.
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