Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-01-10
Phys.Rev.Lett.96:132002,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.96.132002
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.
Gehrmann Thomas
Poulsen E.
Ridder Aude Gehrmann--De
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