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Search for CPT and Lorentz symmetry violation

Speaker: Antonio De Santis

The KLOE experiment at the DA$\Phi$NE $\phi$-factory of the INFN Frascati Laboratory collected data corresponding to 2.5 fb$^{−1}$ of integrated luminosity. Neutral kaon pairs produced in $\phi$ decays offers 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 $\phi \rightarrow K_S K_L \rightarrow \pi^+\pi^-,\pi^+\pi^-$ events has been adopted allowing us to independently measure all four CPT violating parameters $\Delta a_{\mu}$ appearing for neutral kaons in the SME. The final KLOE results on $\Delta a_{\mu}$ will be presented. We also shortly discuss the perspectives for a new measurement using the KLOE-2 apparatus equipped with a new inner tracker.

Kaon13 Conference,
Apr 29, 2013, 12:46 PM