Speaker
Description
In this talk, we perform a comprehensive amplitude analysis on photon-photon scattering into pion&\eta and kaon pairs within the isovector channels. The coupled channel scattering of \pi\eta-K\bar{K}-\pi\eta' are taken into account, and the photon-photon reaction amplitudes are constrained based on the Au-Morgan-Pennington method, where the final states interaction theorem is imposed. The decays of \eta'/\eta-->\pi\gamma\gamma are included in an overall analysis. Constraints from chiral effective field theory, dispersion relations, and the experimental data are considered, too. Finally, a high-quality solution is obtained, and we can extract the scalars involved in these processes. These amplitudes are helpful for further study of Light-by-Light sum rules.
