# Search for decays of $B^0$ mesons into $e^+e^-, \µ^+\µ^-$ and $e^{pm} \µ^{mp}$ final states

Abstract : We present a search for the decays B0 --> e+e-, B0 --> mu+ mu- and B0 --> e mu using data collected with the BABAR detector at the PEP-II e+e-collider at SLAC. Using a dataset corresponding to 384 x 10^6 BBbar 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 x 10^{-8}, B(B0 --> mu+ mu-) < 5.2 x 10^{-8}, and B(B0 --> e mu) < 9.2 x 10^{-8}.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00196829
Contributor : Dominique Girod <>
Submitted on : Thursday, December 13, 2007 - 3:51:46 PM
Last modification on : Saturday, May 22, 2021 - 3:33:53 AM

### Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Search for decays of $B^0$ mesons into $e^+e^-, \µ^+\µ^-$ and $e^{pm} \µ^{mp}$ final states. Physical Review D, American Physical Society, 2008, 77, pp.032007. ⟨10.1103/PhysRevD.77.032007⟩. ⟨in2p3-00196829⟩

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