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Open Access item 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
Citation:Physical Review Letters 107(10): 102003 (2011)
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
E-ISSNmetadata.dc.identifier.doi = DOI:1079-7114
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Appears in Collections:(IFCA) Artículos

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