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

• Verfasst von: Abramowicz, Halina [VerfasserIn]
• Verfasst von: Lisovyi, Mykhailo [VerfasserIn]
• Titel: Further studies of isolated photon production with a jet in deep inelastic scattering at HERA
• Verf.angabe: the ZEUS collaboration
• E-Jahr: 2018
• Jahr: January 9, 2018
• Umfang: 30 S.
• Fussnoten: The ZEUS collaboration: H. Abramowicz, M. Lisovyi [und 111 weitere ] ; Gesehen am 03.04.2019
• Titel Quelle: Enthalten in: Journal of high energy physics
• Ort Quelle: Berlin : Springer, 1997
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018,1) Artikel-Nummer 32, 30 Seiten
• ISSN Quelle: 1029-8479
• DOI: doi:10.1007/JHEP01(2018)032
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Lepton-Nucleon Scattering (experiments)
• Sach-SW: Photon production
• Sach-SW: QCD
• K10plus-PPN: 1662746067

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 < E T γ < 15 GeV and pseudorapidity − 0.7 < η γ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < E T jet < 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 k T -factorisation approach.