TL;DR
This paper presents new experimental results on prompt photon production at HERA, comparing them with theoretical models and finding a preference for the $k_T$-factorisation approach over collinear factorisation.
Contribution
It provides the first detailed comparison of prompt photon production data with $k_T$-factorisation predictions at HERA.
Findings
Data favors $k_T$-factorisation over collinear models.
New measurements in photoproduction and DIS are reported.
Results support the relevance of $k_T$-factorisation in describing prompt photon production.
Abstract
New results are presented on prompt photon production in photoproduction (H1) and DIS (ZEUS). These are compared to the predictions of collinear (DGLAP) factorisation and -factorisation theories. The comparison tends to favour the -factorisation approach.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions