1. General Seminars

# Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment

## by Dr Antonio De Santis (ROMA1;LNF)

Europe/Rome
Aula Bruno Touschek (LNF INFN)

### Aula Bruno Touschek

#### LNF INFN

Via Enrico Fermi, 40 00044 Frascati
Description
Neutral kaon pairs produced in phi-meson decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. The CPT symmetry ensures invariance under the simultaneous transformation of charge conjugation (C), parity (P) and time reversal (T), while CPT violation in any unitary, local, point-particle quantum field theory entails Lorentz invariance violation, as proved in a theorem by Greenberg. Although Lorentz symmetry has been verified in many experiments, as also CPT invariance, it can be considered a sensitive probe for physics at the Planck scale, where natural violation mechanisms exist. In this seminar the analysis of the data collected by the KLOE experiment at the DAFNE is presented. The data are used to perform a measurement of the CPT- violating parameters for neutral kaons in the contest of the Standard Model Extension framework.