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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | Name: ZEUS_2001_S4815815
Year: 2001
Summary: Dijet photoproduction analysis
Experiment: ZEUS
Collider: HERA Run I
SpiresID: 4815815
Status: UNVALIDATED
Authors:
- Jon Butterworth <jmb@hep.ucl.ac.uk>
References:
- Eur.Phys.J.C23:615,2002
- DESY 01/220
- hep-ex/0112029
RunInfo:
820 GeV protons colliding with 27.5 GeV positrons;
Direct and resolved photoproduction of dijets;
Leading jet $pT > 14$ GeV, second jet $pT > 11$ GeV;
Jet pseudorapidity $-1 < |\eta| < 2.4$
NumEvents: 1000000
Beams: [p+, e+]
Energies: [[820, 27.5]]
PtCuts: [0]
Description:
ZEUS photoproduction of jets from proton--positron collisions at beam
energies of 820~GeV on 27.5~GeV. Photoproduction can either be direct,
in which case the photon interacts directly with the parton, or
resolved, in which case the photon acts as a source of quarks and
gluons. A photon-proton centre of mass energy of between 134~GeV and
227~GeV is probed, with values of $x_P$, the fractional momentum of the
partons inside the proton, predominantly in the region between 0.01
and 0.1. The fractional momentum of the partons from the photon,
$x\gamma$, is in the region 0.1 to 1. Jets are reconstructed in the
range $-1 < |\eta| < 2.4$ using the $k_\perp$ algorithm with an $R$
parameter of 1.0. The minimum pT of the leading jet should be greater
than 14~GeV, and at least one other jet must have $pT > 11$~GeV.
BibKey: Chekanov:2001bw
BibTeX: '@Article{Chekanov:2001bw,
author = "Chekanov, S. and others",
collaboration = "ZEUS",
title = "{Dijet photoproduction at HERA and the structure of the
photon}",
journal = "Eur. Phys. J.",
volume = "C23",
year = "2002",
pages = "615-631",
eprint = "hep-ex/0112029",
archivePrefix = "arXiv",
doi = "10.1007/s100520200936",
SLACcitation = "%%CITATION = HEP-EX/0112029;%%"
}'
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