Abstract
The dijet cross section in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 38.6 pb\(^{-1}\). The events were required to have a virtuality of the incoming photon, \(Q^2\), of less than 1 GeV\(^2\) and a photon-proton centre-of-mass energy in the range \(134 < W_{\gamma p} < 277\) GeV. Each event contains at least two jets satisfying transverse-energy requirements of \(E_{T}^{\rm jet1}>14\) GeV and \(E_{T}^{\rm jet2}>11\) GeV and pseudorapidity requirements of \mbox{\(-1<\eta^{\rm jet1,2}<2.4\)}. The measurements are compared to next-to-leading-order QCD predictions. The data show particular sensitivity to the density of partons in the photon, allowing the validity of the current parameterisations to be tested.
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Received: 21 December 2001 / Published online: 5 April 2002
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The ZEUS Collaboration., Chekanov et al., S. Dijet photoproduction at HERA and the structure of the photon. Eur. Phys. J. C 23, 615–631 (2002). https://doi.org/10.1007/s100520200936
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DOI: https://doi.org/10.1007/s100520200936