Total Cross Section In Two-Photon Collisions At Lep

The reaction e(+)e(-) -> e(+)e(-) gamma*gamma* -> e(+)e(-) hadrons for quasi-real photons is studied at LEP by L3 and OPAL collaborations from root s- = 130 GeV up to 202 GeV. Results on the total cross sections sigma(e(+)e(-) -> e(+)e(-) hadrons) and sigma(gamma gamma -> hadrons) are obtained for the two-photon centre-of-mass energies 5 GeV <= W-gamma gamma <= 185 GeV. The total cross section of two real photons can be described by a Regge parametrisation and compared to the expectations of different theoretical models.