Measurements of the rare decay K_{L} -> e^{+} e^{-} e^{+} e^{-}

The KTeV Collaboration, A. Alavi-Harati

We observe 441 K_{L} -> e^{+} e^{-} e^{+} e^{-} candidate events with a background of 4.2 events and measure B(K_{L} -> e^{+} e^{-} e^{+} e^{-}) = (3.72 \pm 0.18(stat) \pm 0.23(sys…