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Measurement of the Photon Structure Function at High $Q^{2}$ at LEP / L3 Collaboration
The structure functions of real and virtual photons are derivedfrom cross section measurements of the reaction$\rm e^+e^-\rightarrow e^+e^- + \hbox{hadrons}$ at LEP.The reaction is studied at $\sqrt{\rm {s}} \simeq 91$ GeV with the L3detector. One of the final state electrons is detected at a large angle relative to the beam direction, leading to $Q^2$ values between40 GeV$^2$ and 500 GeV$^2$.The other final state electron is either undetected or it is detected ata four-momentum transfer squared $P^2$ between 1 GeV$^2$ and 8 GeV$^2$.These measurements are compared with predictions of the Quark PartonModel and other QCD based models..
hep-ex/0004005; CERN-EP-2000-044; CERN-EP-2000-044; CERN-L3-204.- Geneva : CERN, 2000 - 23 p. - Published in : Phys. Lett. B 483 (2000) 373-86 Fulltext: arXiv:hep-ex_0004005 - PDF; ep-2000-044 - PDF; External link: Preprint - Please contact the library if you need to access this document.

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