Wide-angle photoproduction of the ${\eta }^{\prime }$-meson and its gluon content

Peter Kroll, Kornelija Passek-Kumerički

We investigate wide-angle photoproduction of the ${\eta }^{\prime }$ meson within the handbag approach to twist-3 accuracy. It turns out that, due to the gluon content of the ${\eta }^{\prime }$, this process i…