Breakdown of collinear factorization in the exclusive photoproduction of a ${\pi }^0\gamma$ pair with large invariant mass

Saad Nabeebaccus, Jakob Schoenleber, Lech Szymanowski +1

We study the exclusive photoproduction of a ${\pi }^0\gamma$ pair with large invariant mass $M_{\gamma \pi }^2$, which is sensitive to the exchange of either two quarks or two gluons in the $…