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arXiv · 2107.14108

NLO collinear factorization of large mass diphoton photoproduction amplitude

Oskar Grocholski·Bernard Pire·Paweł Sznajder·Lech Szymanowski·Jakub Wagner
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Abstract

We calculate large mass diphoton exclusive photoproduction in the framework of collinear QCD factorization at next to leading order in {\alpha}s and at leading twist. Collinear divergences of the coefficient function are absorbed by the evolution of the generalized parton distributions (GPDs). This result enlarges the existing factorization proofs to 2 -> 3 processes, opening new reactions to a trustable extraction of GPDs.

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Oskar Grocholski, Bernard Pire, Paweł Sznajder, Lech Szymanowski, Jakub Wagner. 2021-07-29. NLO collinear factorization of large mass diphoton photoproduction amplitude. https://arxiv.org/abs/2107.14108

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