Observation of hard scattering in photoproduction at HERA
نویسندگان
چکیده
منابع مشابه
Hard Photoproduction at HERA
In view of possible photoproduction studies in ultraperipheral heavy-ion collisions at the LHC, we briefly review the present theoretical understanding of photons and hard photoproduction processes at HERA, discussing the production of jets, light and heavy hadrons, quarkonia, and prompt photons. We address in particular the extraction of the strong coupling constant from photon structure funct...
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Events containing an isolated prompt photon with high transverse energy, together with a balancing jet, have been observed for the first time in photoproduction at HERA. The data were taken with the ZEUS detector, in a γp centre of mass energy range 120–250 GeV. The fraction of the incoming photon energy participating in the production of the prompt photon and the jet, xγ , shows a strong peak ...
متن کاملParton Distributions from Photoproduction in Polarized ep Scattering at HERA
We study photoproduction of jets and single-inclusive hadrons in a polarized ep collider mode of HERA at √ s ≈ 300 GeV, examining the sensitivity of the cross sections and their asymmetries to the proton’s polarized gluon distribution and to the completely unknown parton distributions of polarized photons. We also present for the first time the NLO corrections to the direct part of polarized si...
متن کاملJet photoproduction at HERA
We compute various kinematical distributions for one-jet and two-jet inclusive photoproduction at HERA. Our results are accurate to next-to-leading order in QCD. We use the subtraction method for the cancellation of infrared singularities. We perform a thorough study of the reliability of QCD predictions; in particular, we consider the scale dependence of our results and discuss the cases when ...
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Selected aspects of photoproduction in ep scattering at the HERA collider, studied with the ZEUS detector, are presented. The results are interpreted in the formalism of Vector Dominance Model, Regge theory and perturbative Quantum Chromodynamics.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1992
ISSN: 0370-2693
DOI: 10.1016/0370-2693(92)91280-m