Observation of the rare eta->e+e-e+e- decay with the KLOE experiment

We report the first observation of the rare eta->e+e-e+e- decay based on 1.7 fb^{-1} collected by the KLOE experiment at the DAFNE phi-factory. The selection of the e+e-e+e- final state is fully inclusive of radiation. We have identified 362 +- 29 events resulting in a branching ratio of (2.4 +- 0.2_stat+bckg +- 0.1_syst) x 10^{-5}.

eta Physics and phi Radiative Decays at Kloe

Here we present KLOE results on the phi meson decays in pi0 pi0 gamma, pi+ pi- gamma and eta pi0 gamma, the measurement of the ratio Br(phi to eta gamma)/Br(phi to eta gamma) with the estimate of the eta gluonium content and the measurement of the eta mass.