Pion and kaon structures from the instanton vacuum

TL;DR

This paper reviews recent theoretical studies on pion and kaon structures using the instanton vacuum approach, calculating various form factors and low-energy constants with results aligning well with experimental data.

Contribution

It introduces a comprehensive calculation of meson properties from the instanton vacuum, including form factors and low-energy constants, advancing non-perturbative QCD understanding.

Findings

Good agreement with experimental data

Calculated electromagnetic form factors

Determined light-cone distribution amplitudes

Abstract

In this presentation, we briefly review recent investigations on pion and kaon structures from the instanton vacuum. Starting from the low-energy QCD partition function, we have computed the Gasser-Leutwyler low-energy constants, electromagnetic form factors of the pion and kaon, semileptonic decay form factors of the kaon, and light-cone distribution amplitues of the pion and kaon. The results are in good agreement with the experimental and empirical data.