Search for the rare leptonic decay B+-->mu(+)nu(mu)

Phys Rev Lett. 2004 Jun 4;92(22):221803. doi: 10.1103/PhysRevLett.92.221803. Epub 2004 Jun 3.

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 x 10(6) BB pairs, we find no significant evidence for a signal and set an upper limit on the branching fraction B(B+-->my(+)nu(my))< 6.6 x 10(-6) at the 90% confidence level.