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Title: Measurement of the Cross Section for Prompt Isolated Diphoton Production in pp̅ Collisions at √s=1.96  TeV
Authors: Aaltonen, T., Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Palencia, Enrique, Rodrigo, Teresa, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Vizán, J.
Issue Date: Sep-2011
Publisher: American Physical Society
Abstract: This Letter reports a measurement of the cross section of prompt isolated photon pair production in pp̅ collisions at a total energy √s=1.96  TeV using data of 5.36  fb-1 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 parton shower calculation and two next-to-leading order calculations. The next-to-leading order 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 next-to-leading order predictions.
Description: 8 páginas, 1 figura.-- PACS numbers: 13.85.Qk.-- CDF Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.107.102003
URI: http://hdl.handle.net/10261/46246
ISSN: 0031-9007
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Citation: Physical Review Letters 107(10): 102003 (2011)
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