Dijet cross sections in photoproduction at HERA

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67 Citations (Scopus)

Abstract

Dijet cross sections are presented using photoproduction data obtained with the ZEUS detector during 1994. These measurements represent an extension of previous results, as the higher statistics allow cross sections to be measured at higher jet transverse energy (ETjet). Jets are identified in the hadronic final state using three different algorithms, and the cross sections compared to complete next-to-leading order QCD calculations. Agreement with these calculations is seen for the pseudorapidity dependence of the direct photon events with ETjet > 6 GeV and of the resolved photon events with ETjet > 11 GeV. Calculated cross sections for resolved photon processes with 6 GeV < ETjet < 11 GeV lie below the data.

Original languageEnglish
Pages (from-to)109-122
Number of pages14
JournalEuropean Physical Journal C
Volume1
Issue number1-2
DOIs
Publication statusPublished - 1998

Bibliographical note

Funding Information:
’ Supported by Worldlab, Lausanne, Switzerland. z Also at 1ROE Florence, Italy. f Now at Univ. of Salerno and INFN Napoli, Italy. 4 New a self-employed consultant. s On leave of absence. IJN ow at Institut fdr Hochenergiephysik,U niv. Heidelberg. ‘Now at MPl Berlin. sNow also at Univ. of Torino. g Presently at Columbia Univ., supported by DAADIHSPII-AUFB. lo Now at Inst. of Computer Science, Jagellonian Univ., Cracow. ” Now at Univ. of Mainz. ‘* Supported by the European Community. I3 Now with OPAL Collaboration, Faculty of Physics at Univ. of Freiburg. I4 Now at SAS-lnstitut GmbH, Heidelberg. I5 Also supported by DESY. I6 Now at GSI Darmstadt. I7 Also supported by NSERC. I8 Now at Institute for Cosmic Ray Research,U niv. of Tokyo. I9 On IeAve of absence at DFSY, supported by DGICYT. Z” Now at Carleton Univ., Ottawa, Canada. *’ Now at Deptiment of Energy, Washington. ** Now at HBP Div., Argonne National Lab., Argonne, IL, USA. 23 Now at RHBNC. Univ. of London, England. 24 Fulbright Scholar 1993-1994. zs Now at Cambridge Consultants, Cambridge, UK. 26 On leave and pattially supported by DBSY 1993-95.

Funding Information:
search and Technology (BMFT) . 42 Supported by the German Federal Ministry for Research and Technology (BMFT), the Volkswagen Foundation, and the Deutsche Forschungsgemeinschaft. 43 Supported by the Spanish Ministry of Education and Science through funds provided by CICYT. 4.1S upported by the Particle Physics and Astronomy Research Council. 45 Supported by the US Department of Energy. 46 Supported by the US National Science Foundation,

Funding Information:
*’ Suppofled by a MlNERVA Fellowship. 2RP artially sqyorted ‘by DESY. 2g Now at Centre for SubatomicR esearchU, niv.of Alberta, Canada and TRIUME Vancouver,C an&a. M Supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) . I’ Supported by the FCAR of Qutbec, Canada. ‘* Supposed by the German Federal Ministry for Research and Technology ( BMm) . 33 Supportedb y the MINERVA Gesellschaftf iir ForschungG mbH, and by the Israel Acaoemy of Science. 34 Supportedb y the German Israeli Foundation, and by the Israel Academy of Science. j5 Supportedb y the Italian National Institute for Nuclear Physics WQW. 36 Supported by the JapaneseM inistry of Education, Science and Culture (the Monbusbo) and its grants for Scientific Research. .17S upported by the Korean Ministry of Education and Korea Science and Engineering Foundation. 38 Supportedb y the NetherlandsF oundationfor Researcho n Matter (FOM). 39 Supportedb y the Polish State Committee for Scientific Research (grant No. SPBIP3/202/93) and the Foundation for Polish-German Collaboration (proj. No. 506192). 4o Supportedb y,tbe Polish State Cornmitt& for Scientific Research (grant No. PB 861/2/91 and Nd. 2 2372 9102, grant No. Pp 2 2376 9102 au4 No. PB 2 0092 9101). 4’ P&ally supported by the German Federal Ministly fdr Re-

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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