A Search for the $B^0 \to e^+e^-γ$ and $B^0 \to μ^+μ^-γ$ Decays

Details A Search for the $B^0 \to e^+e^-γ$ and $B^0 \to μ^+μ^-γ$ Decays A Search for the $B^0 \to e^+e^-γ$ and $B^0 \to μ^+μ^-γ$ Decays

2006-07-25

arxiv.org/abs/hep-ex/0607058v1

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 9 figures, submitted to ICHEP2006

Scientific paper

With the BaBar detector at the PEP-II asymmetric $B$ Factory at SLAC, we present the first search for the decays $B^0\to\ell^+\ell^-\gamma$ ($l=e, \mu$). Using a data set of 292 $fb^{-1}$ collected at the $\Upsilon(4S)$ resonance, we find no significant signal and set the following branching fraction upper limits at 90% confidence level: $\mathcal{B}(B^0\to e^+e^-\gamma)<0.7\times 10^{-7}$ and $\mathcal{B}(B^0\to \mu^+\mu^-\gamma)<3.4\times 10^{-7}$.

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