Dijets in Diffractive Photoproduction at HERA

Reference A Savin, presented at ICHEP 2002, July 2002
Document Conference paper
Figures  (1a)  (1b)  (2)  (3)  (4)  (5)  (6)
Contact S Schaetzel, F Eisele
Abstract A measurement is presented of differential dijet cross sections in low-|t| diffractive photoproduction processes of the type ep -> eXY, in which the photon dissociation system X is separated from a leading low-mass baryonic system Y by a large rapidity gap. The measurement is based on an integrated luminosity of 18 pb-1. Dijet events are identified using the inclusive k_T cluster algorithm. The cross sections are given at the level of stable hadrons and correspond to the kinematic range Q^2 < 0.01 GeV^2, 165 < W < 240 GeV, pom < 0.03, E_T (jet1) > 5 GeV and E_T (jet2) > 4 GeV. The measurements are compared with predictions based on diffractive parton distributions obtained from a QCD analysis of inclusive diffractive DIS and with diffractive dijet production in DIS.
Comments Note that a mistake has been found in the theoretical predictions in the original version of this result (ICHEP02). See the paragraph preceding section 6.1 of the draft for details.  
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