$|V_{us}|$ and $K_S$ Decays from Kloe

TL;DR

This paper presents recent KLOE experiment results on neutral kaon decays, including measurements of branching ratios, lifetime, and the CKM parameter V_{us}, along with an upper limit on a rare decay channel.

Contribution

It provides new precise measurements of kaon decay parameters and the CKM matrix element V_{us} from the KLOE experiment at DAΦNE.

Findings

Measured K_L branching ratios and lifetime with high precision.

Extracted V_{us} from semileptonic K_L decays.

Set the best upper limit on the K_S → πππ0 decay.

Abstract

Recent results obtained by the KLOE experiment operating at DA$\Phi$NE, the Frascati $\phi$-factory, are presented. They mainly concern neutral kaon decays including the $K_L$ dominant branching ratios, the $K_L$ lifetime and the extraction of the $CKM$ parameter $V_{us}$ from the $K_L$ semileptonic decays and lifetime. The best world upper limit on $K_S \to \pppo$ channel is also presented