Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 55, Issue 2, Pages 177-191Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-008-0598-2
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Funding
- STFC [PP/E000452/1, PP/E000673/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000673/1, PP/E000452/1] Funding Source: researchfish
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Diffractive photoproduction of dijets was measured with the ZEUS detector at the ep collider HERA using an integrated luminosity of 77.2 pb(-1). The measurements were made in the kinematic range Q(2) < 1 GeV2, 0.20 < y < 0.85 and x(IP) < 0.025, where Q(2) is the photon virtuality, y is the inelasticity and x(IP) is the fraction of the proton momentum taken by the diffractive exchange. The two jets with the highest transverse energy, E-T(jet), were required to satisfy E-T(jet) > 7.5 and 6.5 GeV, respectively, and to lie in the pseudorapidity range -1.5 < eta(jet) < 1.5. Differential cross sections were compared to perturbative QCD calculations using available parameterisations of diffractive parton distributions of the proton.
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