Direct CP, T and/or CPT violations in the K^0-\bar{K^0} system - Implications of the recent KTeV results on $2\pi$ decays -

TL;DR

This paper analyzes recent KTeV experimental results on CP violation parameters in K0 decays to constrain possible CP, T, and CPT violations, providing updated bounds on decay asymmetries and their implications.

Contribution

It offers a combined analysis of recent experimental data to set new limits on CP, T, and CPT violations in K0 to 2π decays, enhancing understanding of fundamental symmetry violations.

Findings

Re(e_2-e_0) = (0.85 ± 3.11)×10^{-4}

Im(e_2-e_0) = (3.2 ± 0.7)×10^{-4}

Updated bounds on symmetry violations in K0 decays.

Abstract

The recent results on the CP violating parameters Re(e'/e) and \Delta\phi = \phi_{00}-\phi_{+-} reported by the KTeV Collaboration are analyzed with a view to constrain CP, T and CPT violations in a decay process. Combining with some relevant data compiled by the Particle Data Group, we find Re(e_2-e_0) = (0.85 +- 3.11)*10^{-4} and Im(e_2-e_0) = (3.2 +- 0.7)*10^{-4}, where Re(e_I) and Im(e_I) represent respectively CP/CPT and CP/T violations in decay of K^0 and \bar{K^0} into a 2\pi state with isospin I.