Search for B+ --> mu+ nu_mu with inclusive reconstruction at BaBar

2008/07/25 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.0807.4187

10 pages, 8 postscript figures, submitted to ICHEP2008

arxiv created 2008/07/25 · arxiv updated 2009/12/01

Abstract

We search for the purely leptonic decay B^± → μ^± ν_μ in the full BaBar dataset, having an integrated luminosity of approximately 426 fb^-1. We adopt a fully inclusive approach, where the signal candidate is identified by the highest momentum lepton in the event and the companion B is inclusively reconstructed without trying to identify its decay products. We set a preliminary upper limit on the branching fraction of \BR(B^± → μ^± ν_μ) < 1.3 × 10^-6 at the 90% confidence level, using a Bayesian approach.

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