Measurement of the Cross Section for Prompt Isolated Diphoton Production in p (p)over-bar Collisions at root s=1.96 TeV

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doi:10.1103/PhysRevLett.107.102003

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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. RI Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/7068

Titolo:	Measurement of the Cross Section for Prompt Isolated Diphoton Production in p (p)over-bar Collisions at root s=1.96 TeV
Autori interni:	MORELLO, MICHAEL JOSEPH
Data di pubblicazione:	2011
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	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. RI Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Prokoshin, Fedor/E-2795-2012
Handle:	http://hdl.handle.net/11384/7068
Appare nelle tipologie:	1.1 Articolo in rivista

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