Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Abramowicz, H, Abt, I, Adamczyk, L, Adamus, M, Aggarwal, R, Antonelli, S, Aushev, V, Aushev, Y, Behnke, O, Behrens, U
et al (show 104 more authors) (2018) Further studies of isolated photon production with a jet in deep inelastic scattering at HERA. JOURNAL OF HIGH ENERGY PHYSICS, 2018 (1).

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Abstract

Isolated photons with high transverse energy have been studied in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb−1 in the range of exchanged-photon virtuality 10-350 GeV2. Outgoing isolated photons with transverse energy 4 < ETγ < 15 GeV and pseudorapidity − 0.7 < ηγ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ETjet < 35 GeV and −1.5 < ηjet< 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the kT -factorisation approach.

Item Type: Article Lepton-Nucleon Scattering (experiments), Photon production, QCD Symplectic Admin 09 Mar 2018 11:00 19 Jan 2023 06:38 10.1007/JHEP01(2018)032 https://arxiv.org/pdf/1712.04273.pdf https://livrepository.liverpool.ac.uk/id/eprint/3018791