Search for the decay phi -> K0 K0bar gamma with the KLOE experiment
Abstract
We have searched for the decay phi -> K0 K0bar gamma, by detecting Ks pairs plus a photon and with the Ks-mesons decaying to pi+ pi-, in a sample of about 1.5x 109 phi-decays collected by the KLOE experiment at DAFNE. The reaction proceeds through the intermediate states f0(980) gamma, a0(980) gamma. We find five events with 3.2 events expected from background processes. We obtain the upper limit: BR (phi -> K0 K0bar gamma) < 1.9x10-8 at 90% C.L. .
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