AI Article Synopsis
- The study measures the cross section of prompt isolated photon pair production in proton-proton collisions at the Tevatron using data collected by the CDF II detector.
- The results are compared against three different predictions from perturbative quantum chromodynamics (QCD), highlighting the differences in their accuracy.
- The next-to-leading order calculations perform well, and the parton shower prediction matches their accuracy when accounting for photon radiation from quarks before and after hard scattering.
Article Abstract
This Letter reports a measurement of the cross section of prompt isolated photon pair production in pp collisions at a total energy square 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.
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| http://dx.doi.org/10.1103/PhysRevLett.107.102003 | DOI Listing |
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