Measurement of the Photon Structure Function at High Q^2 at LEP

Details Measurement of the Photon Structure Function at High Q^2 at LEP Measurement of the Photon Structure Function at High Q^2 at LEP

2000-04-04

arxiv.org/abs/hep-ex/0004005v1

Phys.Lett.B483:373-386,2000

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1016/S0370-2693(00)00587-6

The structure functions of real and virtual photons are derived from cross section measurements of the reaction e^+e^ -> e^+e^- + hadrons at LEP. The reaction is studied at \sqrt{s} ~ 91 GeV with the L3 detector. One of the final state electrons is detected at a large angle relative to the beam direction, leading to Q^2 values between 40 GeV^2 and 500 GeV^2. The other final state electron is either undetected or it is detected at a four-momentum transfer squared P^2 between 1 GeV^2 and 8 GeV^2. These measurements are compared with predictions of the Quark Parton Model and other QCD based models.

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