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Measurement of the differential cross section for the production of an isolated photon with associated jet in p(p)over-bar collisions at root s=1.96 TeV
University of Chicago.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 531
2008 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 666, no 5, 435-445 p.Article in journal (Refereed) Published
Abstract [en]

The process p (p) over bar -> gamma + jet + X is studied using 1.0 fb(-1) of data collected by the DO detector at the Fermilab Tevatron p (p) over bar collider at a center-of-mass energy root s = 1.96 TeV. Photons are reconstructed in the central rapidity region vertical bar y(gamma)vertical bar < 1.0 with transverse momenta in the range 30 < p(T)(gamma) < 400 GeV while jets are reconstructed in either the central vertical bar y(jet)vertical bar < 0.8 or forward 1.5 < vertical bar y(jet)vertical bar < 2.5 rapidity intervals with P(T)(jet) > 15 GeV. The differential cross section d(3 sigma)/dp(T)(gamma) dy(gamma) dy(jet) is measured as a function of p(T)(gamma) in four regions, differing by the relative orientations of the photon and the jet in rapidity. Ratios between the differential cross sections in each region are also presented. Next-to-leading order QCD predictions using different parameterizations of parton distribution functions and theoretical scale choices are compared to the data. The predictions do not simultaneously describe the measured normalization and p(T)(gamma) dependence of the cross section in the four measured regions.

Place, publisher, year, edition, pages
2008. Vol. 666, no 5, 435-445 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-47352DOI: 10.1016/j.physletb.2008.06.076ISI: 000259716200005Scopus ID: 2-s2.0-50249102243OAI: oai:DiVA.org:kth-47352DiVA: diva2:454817
Note
QC 20111108 Author Count: 531Available from: 2011-11-08 Created: 2011-11-08 Last updated: 2017-12-08Bibliographically approved

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Strandberg, Jonas

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  • apa
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