Prompt Photons in Photoproduction at HERA

Details Prompt Photons in Photoproduction at HERA Prompt Photons in Photoproduction at HERA

2000-08-06

arxiv.org/abs/hep-ex/0008011v1

Physics

High Energy Physics

High Energy Physics - Experiment

for the ZEUS Collaboration; Talk given at the 8th International Workshop on Deep Inelastic Scattering and QCD (DIS'2000), Live

Scientific paper

First inclusive measurements of isolated prompt photons in photoproduction at HERA have been made with the ZEUS detector. Cross sections are given as a function of the pseudorapidity and the transverse energy of the photon, for E_T^gamma > 5 GeV in the gamma-p centre-of-mass energy range 134-285 GeV. Comparisons are made with predictions from LO Monte Carlo models and NLO QCD calculations. For forward eta^gamma (proton direction) good agreement is found, but in the rear direction all predictions fall below the data.

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