https://doi.org/10.1007/BF01245801
Dijet cross sections in photoproduction at HERA
1
Argonne National Laboratory, Argonne, IL, USA
2
Andrews University, Berrien Springs, MI, USA
3
University and INFN Bologna, Bologna, Italy
4
Physikalisches Institut der Universität Bonn, Bonn, Germany
5
H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK
6
Physics Department and INFN, Calabria University, Cosenza, Italy
7
Chonnam National University, Kwangju, Korea
8
Institute of Nuclear Physics, Cracow, Poland
9
Nevis Labs., Columbia University, Irvington on Hudson, N.Y., USA
10
Faculty of Physics and Nuclear Techniques, Academy of Mining and Metallurgy, Cracow, Poland
11
Department of Physics, Jagellonian Univ., Cracow, Poland
12
Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
13
DESY-IfH Zeuthen, Zeuthen, Germany
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 (E τ jet ). 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 E T jet > 6 GeV and of the resolved photon events with E t jet > 11 GeV. Calculated cross sections for resolved photon processes with 6 GeV < E T jet < 11 GeV lie below the data.
© Springer-Verlag, 1998
