A Search for B+ to mu+ nu_mu

Details A Search for B+ to mu+ nu_mu A Search for B+ to mu+ nu_mu

2003-07-17

arxiv.org/abs/hep-ex/0307047v1

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 7 postscript figures, submitted to International Europhysics Conference on High-Energy Physics 2003

Scientific paper

We have performed a search for the leptonic B decay B+ --> mu+ nu_mu with data collected at the Upsilon(4S) resonance by the BABAR experiment at the PEP-II storage ring. With an integrated luminosity of approximately 81.4 fb-1 (88.4 million BBbar pairs), we find no convincing evidence for a signal and set a preliminary upper limit on the branching fraction of BR(B+ --> mu+ nu_mu) < 6.6 x 10^{-6} at the 90% confidence level.

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