Measurement of the CKM Matrix Element |Vub| with B->rho e nu Decays
High Energy Physics - Experiment
2012-08-27 v1
Abstract
We present a measurement of the branching fraction for the rare decays B->rho e nu and extract a value for the magnitude of Vub, one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to parametrize the hadronic current in semileptonic decays. Using a sample of 55 million BBbar meson pairs recorded with the BABAR detector at the PEP-II e+e- storage ring, we obtain Br(B0->rho- e+ nu)=(3.29 +-0.42 +-0.47 +-0.60) x 10^-4 and |Vub|=(3.64 +-0.22 +-0.25 +0.39-0.56)x10^-3, where the uncertainties are statistical, systematic, and theoretical, respectively.
Keywords
Cite
@article{arxiv.hep-ex/0301001,
title = {Measurement of the CKM Matrix Element |Vub| with B->rho e nu Decays},
author = {the BABAR Collatboration and : and B. Aubert},
journal= {arXiv preprint arXiv:hep-ex/0301001},
year = {2012}
}
Comments
Submitted to Phys. Rev. Lett