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

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00009729
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Submitted on : Tuesday, July 11, 2000 - 10:30:31 AM
Last modification on : Friday, September 10, 2021 - 1:50:13 PM
Long-term archiving on: : Tuesday, June 22, 2010 - 3:36:11 PM

### Identifiers

• HAL Id : in2p3-00009729, version 1

### Citation

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Measurement of the Photon Structure Function at High $Q^2$ at LEP. Physics Letters B, Elsevier, 2000, 483, pp.373-386. ⟨in2p3-00009729⟩

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