Experimental results on $K_L$ decays

TL;DR

This paper presents recent experimental measurements of various $K_L$ decay channels, including branching ratios and form factors, providing new data for understanding kaon decays.

Contribution

It reports new experimental results on $K_L$ decay modes, including branching ratios and form factors, from the NA48 experiment at CERN.

Findings

Measured branching ratios for $K_L$ decays.

Determined form factors for specific decay channels.

Provided preliminary results for $K_L o e^+e^-e^+e^-$.

Abstract

Recent measurements by the NA48 at CERN of selected $K_L$ decays are presented. These are the branching ratios and form factors for channels $K_L\to \pi^{\pm}\pi^0\e^{\mp}\nu_e$ (final result), $K_L\to\pi^{\pm}e^{\mp}\nu_e$ and $K_L\to e^+e^-e^+e^-$ (preliminary results).