Aubert, B. et al. (2008) Search for decays of B0 mesons into e+e-, μ+μ- and e±μ∓ final states. Physical Review D, 77 (3). 032007. ISSN 1550-7998

We present a search for the decays B0→e+e-, B0→μ+μ-, and B0→e±μ∓ using data collected with the BABAR detector at the PEP-II e+e- collider at SLAC. Using a data set corresponding to 384×106 BB̅ pairs, we do not find evidence of any of the three decay modes. We obtain upper limit on the branching fractions, at 90% confidence level, of B(B0→e+e-)<11.3×10-8, B(B0→μ+μ-)<5.2×10-8, and B(B0→e±μ∓)<9.2×10-8.