Two-photon annihilation into octet meson pairs: symmetry relations in the handbag approach

TL;DR

This paper investigates how SU(3) flavor symmetry influences two-photon annihilation into octet meson pairs within the handbag approach, successfully describing experimental data and predicting new cross sections.

Contribution

It applies the handbag mechanism with SU(3) symmetry to explain experimental results and provides predictions for unmeasured channels.

Findings

Good agreement with experimental data for measured channels

Two complex form factors fitted to data

Predicted cross section for gamma gamma -> eta eta

Abstract

We explore the implications of SU(3) flavor symmetry in the soft handbag mechanism for two-photon annihilation into pairs of pseudoscalar octet mesons. In this approach we obtain a good description of the experimental results for all measured channels at high energy, with two complex form factors adjusted to the data. We also predict the cross section for gamma gamma -> eta eta.