Decay of pseudoscalars into lepton pairs and large-Nc QCD

TL;DR

This paper investigates the decay of pseudoscalar mesons into lepton pairs using large-Nc QCD and chiral perturbation theory, showing good agreement with experimental data under certain approximations.

Contribution

It provides a theoretical analysis of pseudoscalar meson decays into leptons within large-Nc QCD, incorporating chiral perturbation theory and meson dominance.

Findings

Results agree with experimental data under meson dominance approximation

Theoretical framework connects decay processes with large-Nc QCD principles

Validates the use of chiral perturbation theory in decay calculations

Abstract

The counterterm combination that describes the decay of pseudoscalar mesons into charged lepton pairs at lowest order in chiral perturbation theory is considered within the framework of QCD in the limit of a large number of colours Nc. When further restricted to the lowest meson dominance approximation to large-Nc QCD, our results agree well with the available experimental data.