What question did this study set out to answer?

The goal is to investigate the decay process K_S->3π^0 and its potential CP-violating characteristics.

March 5, 2026Open Access

A Direct Search for the CP-Violating Decay KS->3π⁰ with the KLOE Detector at DAΦNE

Key Points

The goal is to investigate the decay process K_S->3π^0 and its potential CP-violating characteristics.
Utilized the KLOE detector at DAΦNE
Collected data from e+ e- collisions at W∼ m_ϕc^2
Created a pure K_S beam via K_L interaction tagging
Detected the decay using six photons
Established an upper limit for branching ratio at 1.2 x 10^{-7} at 90% confidence level

Abstract

We have searched for the decay KS->3π⁰ with the KLOE experiment at DAΦNE using data from e^+ e^- collisions at a center of mass energy W∼ m_ϕc² 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. 2 x10^-7 at 90% C. L.

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