Studies of K0S decays with the KLOE detector at DAFNE

TL;DR

This paper reports precise measurements of various decay channels of the K0S meson using the KLOE detector at DAFNE, including branching ratios with improved accuracy over previous results.

Contribution

It presents the first precise measurements of K0S decay branching ratios using the KLOE detector, enhancing the understanding of K0S decay properties.

Findings

Measured K0S to two charged and neutral pions branching ratio with 1.5% accuracy.

Measured semileptonic decay branching ratio of K0S with 5% accuracy, the best to date.

Provided data for testing theoretical models of K0S decays.

Abstract

The KLOE detector at DAFNE has collected about 30 pb-1 by the end of year 2000,' allowing, among other things, accurate measurements on several decay channels of the K0S meson. With data acquired in the year 2000 run we have measured the ratio of the branching ratios of the K0S to two charged and neutral pions to 1.5 percent accuracy. The branching ratio of the semileptonic decay of the K0S is also measured to 5 percent accuracy, the best measurement of this BR to date.