High-ET dijet photoproduction at HERA

High-ET dijet photoproduction at HERA

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The cross section for high-ET dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8pb-1. The events were required to have a virtuality of the incoming photon, Q2, of less than 1GeV2 and a photon-proton center-of-mass energy in the...

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Bibliographic Details
Main Authors: Chekanov, S, Derrick, M, Magill, S, Musgrave, B, Nicholass, D, Repond, J, Yoshida, R, Mattingly, M, Jechow, M, Pavel, N, Yagües Molina, A, Antonelli, S, Antonioli, P, Bari, G, Basile, M, Bellagamba, L, Bindi, M, Boscherini, D, Bruni, A, Bruni, G, Cifarelli, L, Cindolo, F, Contin, A, Corradi, M, De Pasquale, S
Format: Journal article
Language:English
Published: 2007
Description
Summary:The cross section for high-ET dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8pb-1. The events were required to have a virtuality of the incoming photon, Q2, of less than 1GeV2 and a photon-proton center-of-mass energy in the range 142<wγp<293gev. at="" etjet1="" events="" if="" jets="" least="" of="" requirements="" satisfied="" selected="" the="" transverse-energy="" two="" were="">20GeV and ETjet2&gt;15GeV and pseudorapidity (with respect to the proton beam direction) requirements of -1&lt;ηjet1,2&lt;3, with at least one of the jets satisfying -1&lt;ηjet&lt;2.5. The measurements show sensitivity to the parton distributions in the photon and proton and to 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. © 2007 The American Physical Society.</wγp<293gev.>

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