A direct search for the CP-violating decay Ks->3p^0 with the KLOE detector at DAFNE

TL;DR

This paper reports a search for the rare CP-violating decay Ks->3p^0 using the KLOE detector, setting an upper limit on its branching ratio based on data from e+e- collisions at DAFNE.

Contribution

First direct search for Ks->3p^0 decay at DAFNE, establishing a new upper limit on its branching ratio with a novel tagging and detection method.

Findings

Upper limit for branching ratio set at 1.2x10^-7 at 90% C.L.

Used a pure Ks beam obtained by tagging with Kl interactions.

Analyzed data from 450 pb^-1 of e+e- collisions at DAFNE.

Abstract

We have searched for the decay Ks->3p^0 with the KLOE experiment at DAFNE using data from e^+ e^- collisions at a center of mass energy W= m(phi) for an integrated luminosity L=450 pb^-1. The search has been performed with a pure Ks beam obtained by tagging with Kl interactions in the calorimeter and detecting six photons. We find an upper limit for the branching ratio of 1.2x10^-7 at 90% C.L.