Measurement of B0 to pi- l+ nu in untagged events and determination of |Vub| at Belle

Abstract

A study of the charmless semileptonic decay B0 to pi- l+ nu using a large sample of untagged Upsilon(4S) to B Bbar events collected with the Belle detector at the KEKB asymmetric e+ e- collider is presented. The branching fraction of the decay is obtained and from this the Cabibbo-Kobayashi-Maskawa matrix element |Vub| is determined using two different approaches.

arXiv commentProceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 September 2010

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