Search for the Rare Leptonic Decay B+ --> mu+ nu_mu

Details Search for the Rare Leptonic Decay B+ --> mu+ nu_mu Search for the Rare Leptonic Decay B+ --> mu+ nu_mu

2004-01-06

arxiv.org/abs/hep-ex/0401002v1

Phys.Rev.Lett.92:221803,2004

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 postscript figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.93.189902

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

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