Latest Results on Kaon Physics from the NA48 Experiment

TL;DR

The NA48 experiment has achieved the most precise measurement of epsilon'/epsilon, along with new data on kaon and eta masses and K-short lifetime, advancing kaon physics research.

Contribution

This paper reports the latest precise measurement of epsilon'/epsilon and new kaon property measurements, enhancing the understanding of CP violation and kaon parameters.

Findings

Most precise epsilon'/epsilon measurement to date

New measurements of K0 and eta masses

Updated K-short lifetime results

Abstract

The NA48 experiment, conceived primarily to look for direct CP violation in neutral kaon decays, has recently published the so far most precise determination of the epsilon'/epsilon parameter. After reviewing shortly this result, we report on the 2001 data-taking, which concluded the epsilon' program by collecting a substantial amount of data with different beam intensity conditions. We also present new precision measurements of the K0 and eta masses and of the K-short lifetime, that provide consistency checks of our analysis. Finally, the prospects for the future experimental program are discussed.