High-E_T dijet photoproduction at HERA

Abstract

The cross section for high-E_T dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8 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 142 < W < 293 GeV. Events were selected if at least two jets satisfied the transverse-energy requirements of E_T(jet1) > 20 GeV and E_T(jet2) > 15 GeV and pseudorapidity requirements of -1 < eta(jet1,2) < 3, with at least one of the jets satisfying -1 < eta(jet) < 2.5. The measurements show sensitivity to the parton distributions in the photon and proton and effects beyond next-to-leading order in QCD. Hence these data can be used to constrain further the parton densities in the proton and photon.

36 pages, 13 figures, 20 tables, including minor revisions from referees. Accepted by Phys. Rev. D

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Cited by in corpus (9)

• The Large Hadron-Electron Collider at the HL-LHC
• The Hadronic Final State at HERA
• Inclusive-jet photoproduction at HERA and determination of alphas
• Jets and QCD: A Historical Review of the Discovery of the Quark and Gluon Jets and its Impact on QCD
• Measurement of beauty photoproduction using decays into muons in dijet events at HERA
• Measurement of the Cross Section for High-p_T Hadron Production in Scattering of 160 GeV/c Muons off Nucleons
• Dijet photoproduction of massless charm jets at next-to-leading order of QCD
• Jets and Measurements of alpha-s
• High-pT photon processes and the photon structure - results from HERA jet and prompt photon (photo)production