The European Physical Journal C

, Volume 49, Issue 2, pp 511–522

Measurement of prompt photons with associated jets in photoproduction at HERA

Authors

  • S. Chekanov
    • Argonne National Laboratory
  • M. Derrick
    • Argonne National Laboratory
  • S. Magill
    • Argonne National Laboratory
  • S. Miglioranzi
    • Argonne National Laboratory
    • Department of PhysicsYork University
  • B. Musgrave
    • Argonne National Laboratory
  • D. Nicholass
    • Argonne National Laboratory
    • University College
  • J. Repond
    • Argonne National Laboratory
  • R. Yoshida
    • Argonne National Laboratory
  • M.C.K. Mattingly
    • Andrews University
  • N. Pavel
    • Institut für PhysikHumboldt-Universität zu Berlin
  • A.G. Yagües Molina
    • Institut für PhysikHumboldt-Universität zu Berlin
  • S. Antonelli
    • University and INFN Bologna
  • P. Antonioli
    • University and INFN Bologna
  • G. Bari
    • University and INFN Bologna
  • M. Basile
    • University and INFN Bologna
  • L. Bellagamba
    • University and INFN Bologna
  • M. Bindi
    • University and INFN Bologna
  • D. Boscherini
    • University and INFN Bologna
  • A. Bruni
    • University and INFN Bologna
  • G. Bruni
    • University and INFN Bologna
  • L. Cifarelli
    • University and INFN Bologna
  • F. Cindolo
    • University and INFN Bologna
  • A. Contin
    • University and INFN Bologna
    • University and INFN Bologna
    • Alexander von Humboldt FellowUniversity of Hamburg
  • S. De Pasquale
    • University and INFN Bologna
  • G. Iacobucci
    • University and INFN Bologna
  • A. Margotti
    • University and INFN Bologna
  • R. Nania
    • University and INFN Bologna
  • A. Polini
    • University and INFN Bologna
  • L. Rinaldi
    • University and INFN Bologna
  • G. Sartorelli
    • University and INFN Bologna
  • A. Zichichi
    • University and INFN Bologna
  • G. Aghuzumtsyan
    • Physikalisches Institut der Universität Bonn
  • D. Bartsch
    • Physikalisches Institut der Universität Bonn
  • I. Brock
    • Physikalisches Institut der Universität Bonn
  • S. Goers
    • Physikalisches Institut der Universität Bonn
  • H. Hartmann
    • Physikalisches Institut der Universität Bonn
  • E. Hilger
    • Physikalisches Institut der Universität Bonn
  • H.-P. Jakob
    • Physikalisches Institut der Universität Bonn
  • M. Jüngst
    • Physikalisches Institut der Universität Bonn
  • O.M. Kind
    • Physikalisches Institut der Universität Bonn
  • E. Paul
    • Physikalisches Institut der Universität Bonn
  • J. Rautenberg
    • Physikalisches Institut der Universität Bonn
    • Univ. of Wuppertal
  • R. Renner
    • Physikalisches Institut der Universität Bonn
  • U. Samson
    • Physikalisches Institut der Universität Bonn
  • V. Schönberg
    • Physikalisches Institut der Universität Bonn
  • M. Wang
    • Physikalisches Institut der Universität Bonn
  • M. Wlasenko
    • Argonne National Laboratory
  • N.H. Brook
    • H.H. Wills Physics LaboratoryUniversity of Bristol
  • G.P. Heath
    • H.H. Wills Physics LaboratoryUniversity of Bristol
  • J.D. Morris
    • H.H. Wills Physics LaboratoryUniversity of Bristol
  • T. Namsoo
    • Argonne National Laboratory
  • M. Capua
    • Physics Department and INFNCalabria University
  • S. Fazio
    • Physics Department and INFNCalabria University
  • A. Mastroberardino
    • Physics Department and INFNCalabria University
  • M. Schioppa
    • Physics Department and INFNCalabria University
  • G. Susinno
    • Physics Department and INFNCalabria University
  • E. Tassi
    • Physics Department and INFNCalabria University
  • J.Y. Kim
    • Chonnam National University
  • K.J. Ma
    • Chonnam National University
  • Z.A. Ibrahim
    • Jabatan FizikUniversiti Malaya
  • B. Kamaluddin
    • Jabatan FizikUniversiti Malaya
  • W.A.T. Wan Abdullah
    • Jabatan FizikUniversiti Malaya
  • Y. Ning
    • Nevis LaboratoriesColumbia University
  • Z. Ren
    • Nevis LaboratoriesColumbia University
  • F. Sciulli
    • Nevis LaboratoriesColumbia University
  • J. Chwastowski
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • A. Eskreys
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • J. Figiel
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • A. Galas
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • M. Gil
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • K. Olkiewicz
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • P. Stopa
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • L. Zawiejski
    • The Henryk Niewodniczanski Institute of Nuclear PhysicsPolish Academy of Sciences
  • L. Adamczyk
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • T. Bołd
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • I. Grabowska-Bołd
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • D. Kisielewska
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • J. Łukasik
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • M. Przybycień
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • L. Suszycki
    • Faculty of Physics and Applied Computer ScienceAGH-University of Science and Technology
  • A. Kotański
    • Department of PhysicsJagellonian University
  • W. Słomiński
    • Department of PhysicsJagellonian University
  • V. Adler
    • Deutsches Elektronen-Synchrotron DESY
  • U. Behrens
    • Deutsches Elektronen-Synchrotron DESY
  • I. Bloch
    • Deutsches Elektronen-Synchrotron DESY
  • A. Bonato
    • Deutsches Elektronen-Synchrotron DESY
  • K. Borras
    • Deutsches Elektronen-Synchrotron DESY
  • N. Coppola
    • Deutsches Elektronen-Synchrotron DESY
  • J. Fourletova
    • Deutsches Elektronen-Synchrotron DESY
  • A. Geiser
    • Deutsches Elektronen-Synchrotron DESY
  • D. Gladkov
    • Deutsches Elektronen-Synchrotron DESY
  • P. Göttlicher
    • Deutsches Elektronen-Synchrotron DESY
    • DESY group FEB
  • I. Gregor
    • Deutsches Elektronen-Synchrotron DESY
  • O. Gutsche
    • Deutsches Elektronen-Synchrotron DESY
  • T. Haas
    • Deutsches Elektronen-Synchrotron DESY
  • W. Hain
    • Deutsches Elektronen-Synchrotron DESY
  • C. Horn
    • Deutsches Elektronen-Synchrotron DESY
  • B. Kahle
    • Deutsches Elektronen-Synchrotron DESY
  • U. Kötz
    • Deutsches Elektronen-Synchrotron DESY
  • H. Kowalski
    • Deutsches Elektronen-Synchrotron DESY
  • H. Lim
    • Deutsches Elektronen-Synchrotron DESY
    • Argonne National Laboratory
  • E. Lobodzinska
    • Deutsches Elektronen-Synchrotron DESY
  • B. Löhr
    • Deutsches Elektronen-Synchrotron DESY
  • R. Mankel
    • Deutsches Elektronen-Synchrotron DESY
  • I.-A. Melzer-Pellmann
    • Deutsches Elektronen-Synchrotron DESY
  • A. Montanari
    • Deutsches Elektronen-Synchrotron DESY
  • C.N. Nguyen
    • Deutsches Elektronen-Synchrotron DESY
  • D. Notz
    • Deutsches Elektronen-Synchrotron DESY
  • A.E. Nuncio-Quiroz
    • Deutsches Elektronen-Synchrotron DESY
  • R. Santamarta
    • Deutsches Elektronen-Synchrotron DESY
  • U. Schneekloth
    • Deutsches Elektronen-Synchrotron DESY
  • A. Spiridonov
    • Deutsches Elektronen-Synchrotron DESY
    • Institut of Theoretical and Experimental Physics
  • H. Stadie
    • Deutsches Elektronen-Synchrotron DESY
  • U. Stösslein
    • Deutsches Elektronen-Synchrotron DESY
  • D. Szuba
    • Deutsches Elektronen-Synchrotron DESY
    • INP
  • J. Szuba
    • Deutsches Elektronen-Synchrotron DESY
    • FPACS, AGH-UST
  • T. Theedt
    • Deutsches Elektronen-Synchrotron DESY
  • G. Watt
    • Deutsches Elektronen-Synchrotron DESY
  • G. Wolf
    • Deutsches Elektronen-Synchrotron DESY
  • K. Wrona
    • Deutsches Elektronen-Synchrotron DESY
  • C. Youngman
    • Deutsches Elektronen-Synchrotron DESY
  • W. Zeuner
    • Deutsches Elektronen-Synchrotron DESY
  • S. Schlenstedt
    • Deutsches Elektronen-Synchrotron DESY
  • G. Barbagli
    • University and INFN
  • E. Gallo
    • University and INFN
  • P.G. Pelfer
    • University and INFN
  • A. Bamberger
    • Fakultät für PhysikUniversität Freiburg i.Br.
  • D. Dobur
    • Fakultät für PhysikUniversität Freiburg i.Br.
  • F. Karstens
    • Fakultät für PhysikUniversität Freiburg i.Br.
  • N.N. Vlasov
    • Fakultät für PhysikUniversität Freiburg i.Br.
  • P.J. Bussey
    • Department of Physics and AstronomyUniversity of Glasgow
  • A.T. Doyle
    • Department of Physics and AstronomyUniversity of Glasgow
  • W. Dunne
    • Department of Physics and AstronomyUniversity of Glasgow
  • J. Ferrando
    • Department of Physics and AstronomyUniversity of Glasgow
  • D.H. Saxon
    • Department of Physics and AstronomyUniversity of Glasgow
  • I.O. Skillicorn
    • Department of Physics and AstronomyUniversity of Glasgow
  • I. Gialas
    • Department of Engineering in Management and FinanceUniv. of Aegean
    • DESY
  • T. Gosau
    • Institute of Exp. PhysicsHamburg University
  • U. Holm
    • Institute of Exp. PhysicsHamburg University
  • R. Klanner
    • Institute of Exp. PhysicsHamburg University
  • E. Lohrmann
    • Institute of Exp. PhysicsHamburg University
  • H. Salehi
    • Institute of Exp. PhysicsHamburg University
  • P. Schleper
    • Institute of Exp. PhysicsHamburg University
  • T. Schörner-Sadenius
    • Institute of Exp. PhysicsHamburg University
  • J. Sztuk
    • Institute of Exp. PhysicsHamburg University
  • K. Wichmann
    • Institute of Exp. PhysicsHamburg University
  • K. Wick
    • Institute of Exp. PhysicsHamburg University
  • C. Foudas
    • High Energy Nuclear Physics GroupImperial College London
  • C. Fry
    • High Energy Nuclear Physics GroupImperial College London
  • K.R. Long
    • High Energy Nuclear Physics GroupImperial College London
  • A.D. Tapper
    • High Energy Nuclear Physics GroupImperial College London
  • M. Kataoka
    • KEKInstitute of Particle and Nuclear Studies
    • ICEPPUniversity of Tokyo
  • T. Matsumoto
    • KEKInstitute of Particle and Nuclear Studies
  • K. Nagano
    • KEKInstitute of Particle and Nuclear Studies
  • K. Tokushuku
    • KEKInstitute of Particle and Nuclear Studies
    • University of Tokyo
  • S. Yamada
    • KEKInstitute of Particle and Nuclear Studies
  • Y. Yamazaki
    • KEKInstitute of Particle and Nuclear Studies
  • A.N. Barakbaev
    • Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan
  • E.G. Boos
    • Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan
  • A. Dossanov
    • Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan
  • N.S. Pokrovskiy
    • Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan
  • B.O. Zhautykov
    • Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan
  • D. Son
    • Center for High Energy PhysicsKyungpook National University
  • J. de Favereau
    • Institut de Physique NucléaireUniversité Catholique de Louvain
  • K. Piotrzkowski
    • Institut de Physique NucléaireUniversité Catholique de Louvain
  • F. Barreiro
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • C. Glasman
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • M. Jimenez
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • L. Labarga
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • J. del Peso
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • E. Ron
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • J. Terrón
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • M. Zambrana
    • Departamento de Física TeóricaUniversidad Autónoma de Madrid
  • F. Corriveau
    • Department of PhysicsMcGill University
  • C. Liu
    • Department of PhysicsMcGill University
  • R. Walsh
    • Department of PhysicsMcGill University
  • C. Zhou
    • Department of PhysicsMcGill University
  • T. Tsurugai
    • Faculty of General EducationMeiji Gakuin University
  • A. Antonov
    • Moscow Engineering Physics Institute
  • B.A. Dolgoshein
    • Moscow Engineering Physics Institute
  • I. Rubinsky
    • Moscow Engineering Physics Institute
  • V. Sosnovtsev
    • Moscow Engineering Physics Institute
  • A. Stifutkin
    • Moscow Engineering Physics Institute
  • S. Suchkov
    • Moscow Engineering Physics Institute
  • R.K. Dementiev
    • Institute of Nuclear PhysicsMoscow State University
  • P.F. Ermolov
    • Institute of Nuclear PhysicsMoscow State University
  • L.K. Gladilin
    • Institute of Nuclear PhysicsMoscow State University
  • I.I. Katkov
    • Institute of Nuclear PhysicsMoscow State University
  • L.A. Khein
    • Institute of Nuclear PhysicsMoscow State University
  • I.A. Korzhavina
    • Institute of Nuclear PhysicsMoscow State University
  • V.A. Kuzmin
    • Institute of Nuclear PhysicsMoscow State University
  • B.B. Levchenko
    • Institute of Nuclear PhysicsMoscow State University
  • O.Y. Lukina
    • Institute of Nuclear PhysicsMoscow State University
  • A.S. Proskuryakov
    • Institute of Nuclear PhysicsMoscow State University
  • L.M. Shcheglova
    • Institute of Nuclear PhysicsMoscow State University
  • D.S. Zotkin
    • Institute of Nuclear PhysicsMoscow State University
  • S.A. Zotkin
    • Institute of Nuclear PhysicsMoscow State University
  • N.P. Zotov
    • Institute of Nuclear PhysicsMoscow State University
  • I. Abt
    • Max-Planck-Institut für Physik
  • C. Büttner
    • Max-Planck-Institut für Physik
  • A. Caldwell
    • Max-Planck-Institut für Physik
  • D. Kollar
    • Max-Planck-Institut für Physik
  • W.B. Schmidke
    • Max-Planck-Institut für Physik
  • J. Sutiak
    • Max-Planck-Institut für Physik
  • G. Grigorescu
    • NIKHEF and University of Amsterdam
  • A. Keramidas
    • NIKHEF and University of Amsterdam
  • E. Koffeman
    • NIKHEF and University of Amsterdam
  • P. Kooijman
    • NIKHEF and University of Amsterdam
  • A. Pellegrino
    • NIKHEF and University of Amsterdam
  • H. Tiecke
    • NIKHEF and University of Amsterdam
  • M. Vázquez
    • NIKHEF and University of Amsterdam
    • CERN
  • L. Wiggers
    • NIKHEF and University of Amsterdam
  • N. Brümmer
    • Physics DepartmentOhio State University
  • B. Bylsma
    • Physics DepartmentOhio State University
  • L.S. Durkin
    • Physics DepartmentOhio State University
  • A. Lee
    • Physics DepartmentOhio State University
  • T.Y. Ling
    • Physics DepartmentOhio State University
  • P.D. Allfrey
    • Department of PhysicsUniversity of Oxford
  • M.A. Bell
    • Department of PhysicsUniversity of Oxford
  • A.M. Cooper-Sarkar
    • Department of PhysicsUniversity of Oxford
  • A. Cottrell
    • Department of PhysicsUniversity of Oxford
  • R.C.E. Devenish
    • Department of PhysicsUniversity of Oxford
  • B. Foster
    • Department of PhysicsUniversity of Oxford
  • C. Gwenlan
    • Department of PhysicsUniversity of Oxford
  • K. Korcsak-Gorzo
    • Department of PhysicsUniversity of Oxford
  • S. Patel
    • Department of PhysicsUniversity of Oxford
  • V. Roberfroid
    • Department of PhysicsUniversity of Oxford
  • A. Robertson
    • Department of PhysicsUniversity of Oxford
  • P.B. Straub
    • Department of PhysicsUniversity of Oxford
  • C. Uribe-Estrada
    • Department of PhysicsUniversity of Oxford
  • R. Walczak
    • Department of PhysicsUniversity of Oxford
  • P. Bellan
    • Dipartimento di Fisica dell’ Università and INFN
  • A. Bertolin
    • Dipartimento di Fisica dell’ Università and INFN
  • R. Brugnera
    • Dipartimento di Fisica dell’ Università and INFN
  • R. Carlin
    • Dipartimento di Fisica dell’ Università and INFN
  • R. Ciesielski
    • Dipartimento di Fisica dell’ Università and INFN
  • F. Dal Corso
    • Dipartimento di Fisica dell’ Università and INFN
  • S. Dusini
    • Dipartimento di Fisica dell’ Università and INFN
  • A. Garfagnini
    • Dipartimento di Fisica dell’ Università and INFN
  • S. Limentani
    • Dipartimento di Fisica dell’ Università and INFN
  • A. Longhin
    • Dipartimento di Fisica dell’ Università and INFN
  • L. Stanco
    • Dipartimento di Fisica dell’ Università and INFN
  • M. Turcato
    • Dipartimento di Fisica dell’ Università and INFN
  • B.Y. Oh
    • Department of PhysicsPennsylvania State University
  • A. Raval
    • Department of PhysicsPennsylvania State University
  • J.J. Whitmore
    • Department of PhysicsPennsylvania State University
  • Y. Iga
    • Polytechnic University
  • G. D’Agostini
    • Dipartimento di FisicaUniversità ’La Sapienza’ and INFN
  • G. Marini
    • Dipartimento di FisicaUniversità ’La Sapienza’ and INFN
  • A. Nigro
    • Dipartimento di FisicaUniversità ’La Sapienza’ and INFN
  • J.E. Cole
    • Rutherford Appleton Laboratory
  • J.C. Hart
    • Rutherford Appleton Laboratory
  • H. Abramowicz
    • Raymond and Beverly Sackler Faculty of Exact Sciences, School of PhysicsTel-Aviv University
    • Alexander von Humboldt Research AwardMax Planck Institute
  • A. Gabareen
    • Raymond and Beverly Sackler Faculty of Exact Sciences, School of PhysicsTel-Aviv University
  • R. Ingbir
    • Raymond and Beverly Sackler Faculty of Exact Sciences, School of PhysicsTel-Aviv University
  • S. Kananov
    • Raymond and Beverly Sackler Faculty of Exact Sciences, School of PhysicsTel-Aviv University
  • A. Levy
    • Raymond and Beverly Sackler Faculty of Exact Sciences, School of PhysicsTel-Aviv University
  • M. Kuze
    • Department of PhysicsTokyo Institute of Technology
  • R. Hori
    • Department of PhysicsUniversity of Tokyo
  • S. Kagawa
    • Department of PhysicsUniversity of Tokyo
    • KEK
  • S. Shimizu
    • Department of PhysicsUniversity of Tokyo
  • T. Tawara
    • Department of PhysicsUniversity of Tokyo
  • R. Hamatsu
    • Tokyo Metropolitan UniversityDepartment of Physics
  • H. Kaji
    • Tokyo Metropolitan UniversityDepartment of Physics
  • S. Kitamura
    • Tokyo Metropolitan UniversityDepartment of Physics
    • Department of Radiological ScienceTokyo Metropolitan University
  • O. Ota
    • Tokyo Metropolitan UniversityDepartment of Physics
  • Y.D. Ri
    • Tokyo Metropolitan UniversityDepartment of Physics
  • M.I. Ferrero
    • Università di Torino and INFN
  • V. Monaco
    • Università di Torino and INFN
  • R. Sacchi
    • Università di Torino and INFN
  • A. Solano
    • Università di Torino and INFN
  • M. Arneodo
    • Università del Piemonte Orientale, Novara, and INFN
  • M. Ruspa
    • Università del Piemonte Orientale, Novara, and INFN
  • S. Fourletov
    • Department of PhysicsUniversity of Toronto
  • J.F. Martin
    • Department of PhysicsUniversity of Toronto
  • S.K. Boutle
    • Physics and Astronomy DepartmentUniversity College London
    • DESY
  • J.M. Butterworth
    • Physics and Astronomy DepartmentUniversity College London
  • R. Hall-Wilton
    • Physics and Astronomy DepartmentUniversity College London
    • CERN
  • T.W. Jones
    • Physics and Astronomy DepartmentUniversity College London
  • J.H. Loizides
    • Physics and Astronomy DepartmentUniversity College London
  • M.R. Sutton
    • Physics and Astronomy DepartmentUniversity College London
  • C. Targett-Adams
    • Physics and Astronomy DepartmentUniversity College London
  • M. Wing
    • Physics and Astronomy DepartmentUniversity College London
  • B. Brzozowska
    • Institute of Experimental PhysicsWarsaw University
  • J. Ciborowski
    • Institute of Experimental PhysicsWarsaw University
    • Łódź University
  • G. Grzelak
    • Institute of Experimental PhysicsWarsaw University
  • P. Kulinski
    • Institute of Experimental PhysicsWarsaw University
  • P. Łużniak
    • Institute of Experimental PhysicsWarsaw University
    • Łódź University
  • J. Malka
    • Institute of Experimental PhysicsWarsaw University
    • Łódź University
  • R.J. Nowak
    • Institute of Experimental PhysicsWarsaw University
  • J.M. Pawlak
    • Institute of Experimental PhysicsWarsaw University
  • T. Tymieniecka
    • Institute of Experimental PhysicsWarsaw University
  • A. Ukleja
    • Institute of Experimental PhysicsWarsaw University
  • J. Ukleja
    • Institute of Experimental PhysicsWarsaw University
  • A.F. Żarnecki
    • Institute of Experimental PhysicsWarsaw University
  • M. Adamus
    • Institute for Nuclear Studies
  • P. Plucinski
    • Institute for Nuclear Studies
  • Y. Eisenberg
    • Department of Particle PhysicsWeizmann Institute
  • I. Giller
    • Department of Particle PhysicsWeizmann Institute
  • D. Hochman
    • Department of Particle PhysicsWeizmann Institute
  • U. Karshon
    • Department of Particle PhysicsWeizmann Institute
  • M. Rosin
    • Department of Particle PhysicsWeizmann Institute
  • E. Brownson
    • Department of PhysicsUniversity of Wisconsin
  • T. Danielson
    • Department of PhysicsUniversity of Wisconsin
  • A. Everett
    • Department of PhysicsUniversity of Wisconsin
  • D. Kçira
    • Department of PhysicsUniversity of Wisconsin
  • D.D. Reeder
    • Department of PhysicsUniversity of Wisconsin
  • P. Ryan
    • Department of PhysicsUniversity of Wisconsin
  • A.A. Savin
    • Department of PhysicsUniversity of Wisconsin
  • W.H. Smith
    • Department of PhysicsUniversity of Wisconsin
  • H. Wolfe
    • Department of PhysicsUniversity of Wisconsin
  • S. Bhadra
    • Department of PhysicsYork University
  • C.D. Catterall
    • Department of PhysicsYork University
  • Y. Cui
    • Department of PhysicsYork University
  • G. Hartner
    • Department of PhysicsYork University
  • S. Menary
    • Department of PhysicsYork University
  • U. Noor
    • Department of PhysicsYork University
  • M. Soares
    • Department of PhysicsYork University
  • J. Standage
    • Department of PhysicsYork University
  • J. Whyte
    • Department of PhysicsYork University
  • The ZEUS Collaboration
Regular Article - Experimental Physics

DOI: 10.1140/epjc/s10052-006-0134-1

Cite this article as:
Chekanov, S., Derrick, M., Magill, S. et al. Eur. Phys. J. C (2007) 49: 511. doi:10.1140/epjc/s10052-006-0134-1

Abstract

The photoproduction of prompt photons, together with an accompanying jet, has been studied in ep collisions at a centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 77 pb-1. Cross sections were measured for the transverse energy of the photon and the jet larger than 5 and 6 GeV, respectively. The differential γ+jet cross sections were reconstructed as functions of the transverse energy, pseudorapidity and xγobs, the fraction of the incoming photon momentum taken by the photon-jet system. Predictions based on leading-logarithm parton-shower Monte Carlo models and next-to-leading-order (NLO) QCD generally underestimate the cross sections for the transverse energies of prompt photons below 7 GeV, while the kT-factorisation QCD calculation agrees with the data better. When the minimum transverse energy of prompt photons is increased to 7 GeV, both NLO QCD and the kT-factorisation calculations are in good agreement with the data.

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