An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

TL;DR

This paper provides a comprehensive analysis of kaon decay data to precisely determine |Vus| and perform rigorous tests of the Standard Model, utilizing recent experimental results and advanced lattice calculations.

Contribution

It offers the first global analysis combining recent experimental data with lattice results to accurately measure |Vus| and test Standard Model predictions.

Findings

Precise value of |Vus| obtained

Stringent tests of the Standard Model performed

Consistency with theoretical predictions confirmed

Abstract

We present a global analysis of leptonic and semileptonic kaon decay data, including all recent results published by the BNL-E865, KLOE, KTeV, ISTRA+ and NA48 experiments. This analysis, in conjunction with precise lattice calculations of the hadronic matrix elements now available, leads to a very precise determination of |Vus| and allows us to perform several stringent tests of the Standard Model.