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Derrick, M.; Krakauer, D.; Magill, S.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); ZEUS Collaboration1995
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); ZEUS Collaboration1995
AbstractAbstract
[en] Photoproduction at HERA is studied in ep collisions, with the ZEUS detector, for γp centre-of-mass energies ranging from 130-270 GeV. A sample of events with two high-pT jets (pT>6 GeV, η<1.6) and a third cluster in the approximate direction of the electron beam is isolated using a clustering algorithm. These events are mostly due to resolved photoproduction. The third cluster is identified as the photon remanant. Its properties, such as the transverse and lognitudinal energy flows around the axis of the cluster, are consistent with those commonly attributed to jets, and in particular with those found for the two jets in the events. The mean value of the photon remnant pT with respect to the beam axis is measured to be 2.1±0.2 GeV, which demonstrates substantial mean transverse momenta for the photon remnant. (orig.)
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25 Apr 1995; 20 p; ISSN 0418-9833; 

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Report
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BASIC INTERACTIONS, BOSONS, ELECTROMAGNETIC INTERACTIONS, ELEMENTARY PARTICLES, ENERGY RANGE, FIELD THEORIES, GEV RANGE, INTERACTIONS, LINEAR MOMENTUM, MASSLESS PARTICLES, MATHEMATICAL MODELS, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PRODUCTION, PHOTON-BARYON INTERACTIONS, PHOTON-HADRON INTERACTIONS, PHOTON-NUCLEON INTERACTIONS, QUANTUM FIELD THEORY
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