Measurement of the Hadronic Photon Structure Function F2gamma at LEP2

Details Measurement of the Hadronic Photon Structure Function F2gamma at LEP2 Measurement of the Hadronic Photon Structure Function F2gamma at LEP2

2002-02-19

arxiv.org/abs/hep-ex/0202035v1

Phys.Lett.B533:207-222,2002

Physics

High Energy Physics

High Energy Physics - Experiment

23 pages, 5 figures, Submitted to Phys. Lett. B

Scientific paper

The hadronic structure of the photon F2gamma is measured as a function of Bjorken x and of the photon virtuality Q2 using deep-inelastic scattering data taken by the OPAL detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV. Previous OPAL measurements of the x dependence of F2gamma are extended to an average Q2 of =780GeV2 using data in the kinematic range 0.15 < x < 0.98. The Q2 evolution of F2gamma is studied for 12.1 < < 780GeV2 using three ranges of x. As predicted by QCD, the data show positive scaling violations in F2gamma for the central x region 0.10-0.60. Several parameterisations of F2gamma are in qualitative agreement with the measurements whereas the quark-parton model prediction fails to describe the data.

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