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

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.
Comment: 15 pages, 5 figures