Neutral kaon interferometry at KLOE and KLOE-2

TL;DR

This paper discusses the use of neutral kaon pairs at a phi-factory to test fundamental physics principles like CPT invariance and quantum mechanics, highlighting ongoing analyses and future improvements with upgraded detectors.

Contribution

It presents new experimental data and analysis methods from the KLOE and KLOE-2 experiments to test CPT symmetry and quantum decoherence in neutral kaon systems.

Findings

Improved limits on CPT violation parameters

Measurements of decoherence effects in kaon pairs

Enhanced sensitivity with KLOE-2 upgrade

Abstract

Neutral kaons produced in correlated pairs at a phi-factory offer unique possibilities to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The analysis of the data collected by the KLOE experiment at DAFNE is still ongoing with the aim of improving previous results and limits on several parameters describing CPT violation and decoherence. Ancillary measurements like the regeneration cross section on the beam pipe materials are also in progress and will be very useful to reduce the systematic uncertainties. Prospects on improvements at the KLOE-2 experiment, aiming at an increase of the integrated luminosity of about a factor of ten with an upgraded detector, will be also discussed.