Study of KS semileptonic decays and CPT test with the KLOE detector

TL;DR

This paper reviews how semileptonic decays of neutral kaons can test CPT symmetry and the Standard Model, including recent charge asymmetry measurements from the KLOE detector at DAFNE.

Contribution

It provides a comprehensive review of the relationship between charge asymmetry in kaon decays and CPT symmetry, with updated experimental results from KLOE.

Findings

Charge asymmetry measurements for short-lived kaons are consistent with CPT symmetry.

Reconstruction of about 10^5 KS decays at DAFNE was achieved.

The study supports the Standard Model's predictions on kaon decays.

Abstract

Study of semileptonic decays of neutral kaons allows to perform a test of discrete symmetries, as well as basic principles of the Standard Model. In this paper a general review on dependency between charge asymmetry constructed for semileptonic decays of short- and long-lived kaons and CPT symmetry is given. The current status of determination of charge asymmetry for short-lived kaon, obtained by reconstruction of about 10^5 KS -> pen decays collected at DAFNE with the KLOE detector is also reviewed.