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

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

2008-07-25

arxiv.org/abs/0807.4187v1

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 8 postscript figures, submitted to ICHEP2008

Scientific paper

We search for the purely leptonic decay $B^{\pm} \to \mu^{\pm} \nu_{\mu}$ 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 $\BR(B^{\pm} \to \mu^{\pm} \nu_{\mu}) < 1.3 \times 10^{-6}$ at the 90% confidence level, using a Bayesian approach.

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