Measurements of the meson-photon transition form factors of light pseudoscalar mesons at large momentum transfer

Using the CLEO II detector, we have measured the differential cross sections for exclusive two-photon production of light pseudoscalar mesons ${\pi }^0,$ η, and ${\eta }^{\prime }.$ From our measurements we have obtained the form factors associated with the electromagnetic transitions ${\gamma }^{*}\overrightarrow{\gamma }\mathrm{meson}.$ We have measured these form factors in the momentum transfer ranges from 1.5 to 9, 20, and $30{\mathrm{GeV}}^2$ for ${\pi }^0,$ η, and ${\eta }^{\prime },$ respectively, and have made comparisons to various theoretical predictions.