CPT and QM tests using kaon interferometry

TL;DR

This paper reviews recent experimental tests of CPT invariance and quantum mechanics using neutral kaon interferometry, highlighting no observed deviations and discussing future prospects at upgraded colliders.

Contribution

It provides a comprehensive review of the latest limits on CPT violation and quantum decoherence from kaon experiments, including potential quantum gravity effects.

Findings

No deviations from quantum mechanics or CPT symmetry observed.

Experimental limits reach near the Planck scale.

Prospects for future tests at upgraded colliders discussed.

Abstract

The neutral kaon system offers a unique possibility to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The most recent and significant limits on CPT violation are reviewed, including the ones related to possible decoherence mechanisms or Lorentz symmetry breaking, which might be induced by quantum gravity. The experimental results show no deviations from the expectations of quantum mechanics and CPT symmetry, while the accuracy in some cases reaches the interesting Planck scale region. Finally, prospects for this kind of experimental studies at the upgraded DAFNE e+e- collider at Frascati are briefly discussed.