A direct test of time-reversal symmetry in the neutral K meson system with KS → πℓν and KL → 3π0 at KLOE-2

Aleksander Gajos

doi:10.1051/epjconf/20148103004

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 81, 03004 (2014)
https://doi.org/10.1051/epjconf/20148103004

A direct test of time-reversal symmetry in the neutral K meson system with KS → πℓν and K_L → 3π⁰ at KLOE-2

Aleksander Gajos^a on behalf of the KLOE-2 Collaboration

Institute of Physics, Jagiellonian University, ul. Reymonta 4, 30-059 Cracow, Poland

^a e-mail: aleksander.gajos@uj.edu.pl

Published online: 26 November 2014

Abstract

Quantum entanglement of K and B mesons allows for a direct experimental test of time-reversal symmetry independent of CP violation. The T symmetry can be probed by exchange of initial and final states in the reversible transitions between flavor and CP- definite states of the mesons which are only connected by the T conjugation. While such a test was successfully performed by the BaBar experiment with neutral B mesons, the KLOE-2 detector can probe T -violation in the neutral kaons system by investigating the process with K_S → π^±l^∓ν_l and K_L → 3π⁰ decays. Analysis of the latter is facilitated by a novel reconstruction method for the vertex of K_L → 3π⁰ decay which only involves neutral particles. Details of this new vertex reconstruction technique are presented as well as prospects for conducting the direct T symmetry test at the KLOE-2 experiment.

© Owned by the authors, published by EDP Sciences, 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.