Lattice Kaon Physics

TL;DR

This paper reviews lattice QCD calculations related to kaon physics, including masses, decay constants, decay form factors, and oscillation parameters, highlighting recent progress and challenges in the field.

Contribution

It provides a comprehensive overview of lattice QCD results on kaon properties, emphasizing developments in decay constants, form factors, and mixing parameters.

Findings

Accurate calculations of $f_K/f_\pi$ have improved understanding of CKM matrix elements.

Lattice results for semi-leptonic decay form factors have advanced, aiding in precise tests of the Standard Model.

Determinations of $B_K$ contribute to constraints on CP violation and new physics.

Abstract

I review lattice quantum chromodynamics as relevant to the kaon system. Topics covered include the pseudoscalar masses and decay constants, the chiral effective lagrangian, $f_K/f_\pi$, semi-leptonic kaon decay form factors, and the neutral kaon oscillation parameter $B_K$.