Seminarium Teorii Oddziaływań Elementarnych

We discuss basics of the CPT and anti-CPT theorems, the logic behind and physics motivation for testing CPT and Lorentz invariance with extreme precission. The best accuracy is nowadays provided by interferometric measurements in neutral meson systems. We present current experimental knowledge from the strange, charm and beauty decays, with emphasis on the recently obtained results by KLOE using neutral kaons. Perspectives for improvements are also discussed.