This Letter reports a measurement of the cross section of prompt isolated photon pair production in p (p) over bar collisions at a total energy root 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.
|Titolo:||Measurement of the Cross Section for Prompt Isolated Diphoton Production in p (p)over-bar Collisions at root s=1.96 TeV|
|Citazione:||T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurement of the Cross Section for Prompt Isolated Diphoton Production in p (p)over-bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 107(10), 102003-1-102003-8.|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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