22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Measurement of the decay B -> D^* l^+ nu and determination of |V_{cb}| at Belle

24 Jul 2010, 11:00
13m
Salle 242A ()

Salle 242A

Parallel Session Talk 06 - CP violation, CKM and Rare Decays 06 - CP violation, CKM and Rare Decays

Speaker

Wolfgang Dungel (Austrian Academy of Sciences)

Description

We present measurements of the branching fraction and the HQET form factors rho^2, R_1 and R_2 for the decay B0 -> D*-l^+ nu using untagged Upsilon(4S) -> B anti-B events. The Cabibbo-Kobayashi-Maskawa matrix element |V_{cb}| is extracted and a test of the form factor parametrization is presented. The results are based on a large data sample recorded by the Belle detector at the KEKB e+ e- collider. The measurement of the decay B+ -> anti-D*0 l nu does not rely on charged slow pion reconstruction, and thus allows us to cross-check measurements of B0 -> D*- l+ nu. We also present measurements of the branching fraction and of the HQET form factors rho^2, R_1 and R_2 obtained with this decay.

Primary author

Presentation Materials