Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-06-25
Phys.Rev.Lett.107:102003,2011
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 1 figure, submitted to Physical Review Letters
Scientific paper
10.1103/PhysRevLett.107.102003
This letter reports a measurement of the cross section of prompt isolated photon pair production in p\bar p collisions at a total energy \sqrt{s} = 1.96 TeV using data of 5.36/fb integrated luminosity collected with the CDF II detector at the Fermilab Tevatron. The measured cross section, differential in basic kinematic variables, is compared with three perturbative QCD predictions, a Leading Order (LO) parton shower calculation and two Next-to-Leading Order (NLO) calculations. The NLO calculations reproduce most aspects of the data. By including photon radiation from quarks before and after hard scattering, the parton shower prediction becomes competitive with the NLO predictions.
Aaltonen Timo
CDF Collaboration
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