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Leipzig 2002 – scientific programme

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T: Teilchenphysik

T 503: Diffraktion

T 503.8: Talk

Thursday, March 21, 2002, 18:00–18:15, HS 10

Analysis of prompt photon production at H1 — •Rachid Lemrani — DESY FH1 Notkestr. 85 22603 Hamburg

A measurement of inclusive prompt photon events in photoproduction at HERA is discussed. Data are presented as a function of transverse energy ETγ and pseudorapidity ηγ for ETγ>6 GeV and −1<ηγ<1.5 in the γp center of mass energy range 70-270 GeV. The data were taken with the H1 detector in the years 1996-2000. After selection of prompt photon candidates, a sizable amount of background from π0 mesons remains and the signal is extracted by a likelihood technique using the shower shape variables as discriminators. The results are compared to the PYTHIA Monte-Carlo and a NLO-QCD calculation.

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