Precision SM calculations and theoretical interests beyond the SM in K_{l2} and K_{l3} decays

TL;DR

This paper reviews recent theoretical advances in analyzing K_{l2} and K_{l3} decays, highlighting their importance for testing the Standard Model and extracting fundamental parameters like |V_{us}|.

Contribution

It provides an overview of new theoretical methods and results related to K_{l2} and K_{l3} decays beyond the Standard Model.

Findings

Improved theoretical descriptions of K_{l2} and K_{l3} decays.

Enhanced precision in extracting |V_{us}| and testing CKM unitarity.

New insights into lepton universality and quark mass ratios.

Abstract

We present a brief overview of the recent theoretical progress to describe the K_{l2} and K_{l3} decays. We discuss the interesting probes of the Standard Model offered by these decays such as the extraction of |V_{us}| and the test of the CKM unitarity, the tests of lepton universality, the quark mass ratio determination and the test of the electroweak couplings of the light quarks to the W-boson.