# Experimental determination of $V_{us}$ from kaon decays

## TL;DR

This paper reviews the current experimental status of measuring the CKM matrix element $V_{us}$ through kaon decays, discussing limitations and future measurement prospects.

## Contribution

It provides a comprehensive overview of experimental results and identifies key factors affecting the precision of $V_{us}$ determination from kaon decay data.

## Key findings

- Current experimental uncertainties in $V_{us}$ measurements
- Factors limiting precision in kaon decay experiments
- Future measurement prospects within the next few years

## Abstract

The status of the experimental determination of $V_{us}$ from $K_{\ell3}$ and $K_{\mu2}$ decays is reviewed. Factors currently limiting the precision of the evaluation of $V_{us}$ from kaon decays and prospects for new measurements within the next few years are discussed.