Determination of CP and CPT violation parameters in the neutral kaon system using the Bell-Steinberger relation and data from the KLOE experiment

TL;DR

This paper refines measurements of CP and CPT violation parameters in the neutral kaon system using the Bell-Steinberger relation and recent KLOE data, confirming no CPT violation within experimental uncertainties.

Contribution

It provides an improved determination of CP and CPT violation parameters in the neutral kaon system using unitarity and recent experimental data.

Findings

Re(epsilon) = (159.6 ± 1.3)×10^-5

Im(delta) = (0.4 ± 2.1)×10^-5

Results are consistent with no CPT violation.

Abstract

We present an improved determination of the CP and CPT violation parameters Re(epsilon) and Im(delta) based on the unitarity condition (Bell-Steinberger relation) and on recent results from the KLOE experiment. We find Re(epsilon) = (159.6 \pm 1.3)10^-5 and Im(delta) = (0.4 \pm 2.1)10^-5, consistent with no CPT violation.