Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-06-25
Phys.Rev.D84:052006,2011
Physics
High Energy Physics
High Energy Physics - Experiment
33 pages, 21 figures, submitted to Physical Review D
Scientific paper
10.1103/PhysRevD.84.052006
This article reports a measurement of the production cross section of prompt isolated photon pairs in proton-antiproton collisions at \sqrt{s} = 1.96 TeV using the CDF II detector at the Fermilab Tevatron collider. The data correspond to an integrated luminosity of 5.36/fb. The cross section is presented as a function of kinematic variables sensitive to the reaction mechanisms. The results are compared with three perturbative QCD calculations: (1) a leading order parton shower Monte Carlo, (2) a fixed next-to-leading order calculation and (3) a next-to-leading order/next-to-next-to-leading-log resummed calculation. The comparisons show that, within their known limitations, all calculations predict the main features of the data, but no calculation adequately describes all aspects of the data.
Aaltonen Timo
CDF Collaboration
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