Abstract
The KLOE experiment at the DAΦNE ϕ-factory located at the INFN Laboratory in Frascati, Italy collected data corresponding to 2.5 fb−1 of integrated luminosity. Neutral kaon pairs produced in ϕ-meson decays offer a unique possibility to perform tests of fundamental discrete symmetries. The entanglement of the two kaons is exploited to search for possible violation of CPT symmetry and Lorentz invariance in the context of the Standard-Model Extension (SME) framework. A new approach to the analysis of ϕ → KSKL → π+π−,π+π− events has been adopted allowing us to independently measure all four CPT violating parameters Δaμ appearing for neutral kaons in the SME. The final KLOE results on Δaμ will be presented. These are presently the most precise measurements in the quark sector of the SME.
Highlights
The invariance under CPT operation, the combined action of charge conjugation (C), parity reflection (P), and time-reversal (T), is fundamental in the framework of any quantum field theory
As a consequence of Lorenz invariance, unitarity and locality of quantum field theory CPT may be violated in the presence of quantum gravity effects (QG)
In several QG models CPT can be violated via some mechanism which violates standard Quantum Mechanics (QM) [2, 3], eg. causing decoherence of an entangled quantum state
Summary
The invariance under CPT operation, the combined action of charge conjugation (C), parity reflection (P), and time-reversal (T), is fundamental in the framework of any quantum field theory. On phenomenological grounds the CPT and Lorentz symmetries violation induced by quantum gravity effects is expected at energies of the order of ∼ 1020 GeV, they might give rise to observable effects in the low energy regime, in the entangled neutral meson systems [8]. These effects have been searched for in the B mesons system by the BaBar collaboration [9] and in the neutral kaon system by the KLOE experiment operating at the DAΦNE φ-factory.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call