PT Journal
AU KLOE-2 Collaboration (Babusci, Dea
   Bernabeu, J
TI Direct tests of T, CP, CPT symmetries in transitions of neutral K mesons with the KLOE experiment
SO Physics Letters B
JI Phys. Lett. B
PY 2023
BP 138164 - 11pp
VL 845
DI 10.1016/j.physletb.2023.138164
LA English
DE Discrete and finite symmetries; Kaon physics; CP violation
AB Tests of the T, CP and CPT symmetries in the neutral kaon system are performed by the direct comparison of the probabilities of a kaon transition process to its symmetry-conjugate. The exchange of in and out states required for a genuine test involving an antiunitary transformation implied by time-reversal is implemented exploiting the entanglement of K0K0 pairs produced at a 0 -factory.A data sample collected by the KLOE experiment at DAONE corresponding to an integrated luminosity of about 1.7 fb-1 is analysed to study the At distributions of the 0 -> KSKL -> pi+pi- pi +/- e -/+ v and 0 -> KSKL -> pi +/- e -/+ v3 pi 0 processes, with At the difference of the kaon decay times. A comparison of the measured At distributions in the asymptotic region At ⠅ iS allows to test for the first time T and CPT symmetries in kaon transitions with a precision of few percent, and to observe CP violation with this novel method.
ER