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# Search for the rare leptonic decay $B^+ \to \mu^+\nu-\mu$

Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00021990
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Submitted on : Wednesday, June 30, 2004 - 11:49:27 AM
Last modification on : Tuesday, January 25, 2022 - 12:48:06 PM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, J.M. Gaillard, et al.. Search for the rare leptonic decay $B^+ \to \mu^+\nu-\mu$. Physical Review Letters, American Physical Society, 2004, 92, pp.221803. ⟨in2p3-00021990⟩

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