2006/01/10 by A. Gehrmann–De Ridder, A. Gehrmann-De Ridder, T. Gehrmann +1 · 26 citations
Physics and Astronomy · #Cross section (physics) #Deep inelastic scattering #Fragmentation (computing) #HERA #High-Energy Particle Collisions Research #Inelastic scattering #Nuclear physics #Observable #Optics #Particle physics #Particle physics theoretical and experimental studies #Parton #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Scattering #ZEUS (particle detector) #hep-ph
paper · pdf · doi:10.1103/physrevlett.96.132002
published in Physical Review Letters 96(13), 132002 (American Physical Society) · 4 pages, 3 figures
arxiv created 2006/01/10 · openalex publication_date 2006/04/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Photon radiation at large transverse momenta at colliders is a detailed probe of hard interaction dynamics. The isolated photon production cross section in deep inelastic scattering was measured recently by the ZEUS experiment, and found to be considerably larger than theoretical predictions obtained with widely used event generators. To investigate this discrepancy, we perform a dedicated parton-level calculation of this observable, including contributions from fragmentation and large-angle radiation. Our results are in good agreement with all aspects of the experimental measurement.