Exclusive semileptonic b -> c decays at Belle

Details Exclusive semileptonic b -> c decays at Belle Exclusive semileptonic b -> c decays at Belle

2009-10-08

arxiv.org/abs/0910.1438v1

PoS EPS-HEP2009 2009:200,2009

Physics

High Energy Physics

High Energy Physics - Experiment

Parallel talk at EPS08, Krakow, Poland, August 2009. 5 pages, 3 figures

Scientific paper

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 |V_{cb}| and the HQET form factor parameters \rho^2, R_1 and R_2 extracted from B^+ -> \bar{D}^{*0} \ell^+ \nu decays using untagged Upsilon(4S) events. Additionally, a test of the form factor parametrization is performed. Secondly, measurements of B -> D^* \tau \nu and B -> D \tau \nu 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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