Measurement of the Hadronic Cross-Section for the Scattering of Two Virtual Photons at LEP

Details Measurement of the Hadronic Cross-Section for the Scattering of Two Virtual Photons at LEP Measurement of the Hadronic Cross-Section for the Scattering of Two Virtual Photons at LEP

2001-10-03

arxiv.org/abs/hep-ex/0110006v1

Eur.Phys.J.C24:17-31,2002

Physics

High Energy Physics

High Energy Physics - Experiment

30 pages, 10 figures, Submitted to Eur.Phys.J. C

Scientific paper

10.1007/s100520200940

The interaction of virtual photons is investigated using the reaction e+e- -> e+e- hadrons based on data taken by the OPAL experiment at e+e- centre-of-mass energies sqrt(s_ee)=189-209 GeV, for W>5 GeV and at an average Q^2 of 17.9 GeV^2. The measured cross-sections are compared to predictions of the Quark Parton Model (QPM), to the Leading Order QCD Monte Carlo model PHOJET to the NLO prediction for the reaction e+e- -> e+e-qqbar, and to BFKL calculations. PHOJET, NLO e+e- -> e+e-qqbar, and QPM describe the data reasonably well, whereas the cross-section predicted by a Leading Order BFKL calculation is too large.

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