Electromagnetic Transition Form Factors of Mesons

TL;DR

This paper develops a unified counting scheme for mesons to predict electromagnetic decay widths of omega and phi mesons into dileptons and pseudoscalar mesons, achieving good agreement with experiments.

Contribution

It introduces a novel counting scheme that treats pseudoscalar and vector mesons equally, enabling parameter-free predictions of decay widths.

Findings

Predicted decay widths match experimental data well.

The counting scheme provides a unified framework for meson decays.

Parameters are determined from other reactions, enhancing predictive power.

Abstract

Using a counting scheme which treats pseudoscalar and vector mesons on equal footing, the decays of the narrow light vector mesons omega and phi into a dilepton and a pseudoscalar pi-meson or eta-meson, respectively, are calculated. Thereby, all required parameters could be determined by other reactions so that one has predictive power for the considered decays. The calculated partial decay widths are in very good agreement with the experimental data.