Measurement of the cross-section for the process $\gamma^{\star}\gamma^{\star} \to$ hadrons at LEP
1999
Measurements of the two-photon interaction e+e- --> e+e- hadrons at sqrt(s) = 91 GeV and sqrt(s) = 183 GeV are presented. The double-tag events, collected with the L3 detector, correspond to integrated luminosities of 140 pb-1 at 91 GeV and 52 pb-1 at 183 GeV. The cross-section of gamma*gamma* collisions has been measured at Q^2 = 3.5 GeV^2 and Q^2 = 14 GeV^2. The data agree well with predictions based on perturbative QCD, while the Quark Parton Model alone is insufficient to describe the data.
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