1995/08/30 by Martin Utley, Utley, Martin
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/9508016
4 pages. 3 postscript figures + 1 postscript preprint logo + 1 LaTeX file + 1 non-standard style file. Uses epsfig. Files tarred, gzipped and uuencoded into 1 file. Also available at http://ppewww.ph.gla.ac.uk/preprints/95/03
arxiv created 1995/08/30 · arxiv updated 2009/11/30
Preliminary results are presented from a study of dijet photoproduction in ep collisions with both virtual and quasi-real photons at the ZEUS detector. Samples of events with photons of virtuality P2 in the ranges 0.1 < P2 < 0.55 GeV2 and P2 < 0.02 GeV2 having two jets of ETjet > 4 GeV in the final state have been obtained. For both quasi-real and virtual photons, uncorrected distributions of the quantity xγobs, the fraction of the photon momentum manifest in the two highest ET jets, are presented. These distributions are sensitive to the relative contributions of the direct and resolved processes. Resolved photon processes are evident in both data sets, with an apparent decrease in the relative contribution from resolved processes as photon virtuality increases.