Search for decays of B0-->e+ e-, B0-->mu+ mu-, B0-->e +/- mu-/+

Phys Rev Lett. 2005 Jun 10;94(22):221803. doi: 10.1103/PhysRevLett.94.221803. Epub 2005 Jun 8.

Abstract

We present a search for the decays B0-->e+ e-, B0-->mu+ mu-, and B0-->e (+/-) mu (-/+) in data collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC B Factory. Using a data set of 111 fb(-1), we find no evidence for a signal in any of the three channels investigated and set the following branching fraction upper limits at the 90% confidence level: B(B0-->e+ e-) < 6.1 x 10(-8), B(B0-->mu+ mu-) < 8.3 x 10(-8), and B(B0-->e (+/-) mu (-/+) )<18 x 10(-8).