Prompt Photons in Photoproduction at HERA

2000/08/06 by Sung-Won Lee, Lee, Sung-Won
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0008011

for the ZEUS Collaboration; Talk given at the 8th International Workshop on Deep Inelastic Scattering and QCD (DIS'2000), Liverpool, UK, April 25-30, 2000

arxiv created 2000/08/06 · arxiv updated 2009/11/30

Abstract

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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