Total: Total Cross Section for Two-Photon Collisions at LEP

The reaction e+e-  --->e+e- gamma*gamma* --> e+e- hadrons
is analysed for quasi-real photons using 
data collected by the L3 detector  during the LEP high energy runs 
at center-of-mass energies from 189 GeV to 202 GeV .
 Results on the total cross sections 
 e+e- -->e+e- hadrons and  gamma-gamma -->  hadrons are given in the 
interval  with   W(gamma-gamma) between 5 GeV and 165 GeV.
 The centre-of-mass energy dependence of the two-photon
 cross section 
is  described using the universal Regge parametrisation. We observe
 a steeper rise with W(gamma-gamma) as compared to
hadron-hadron cross sections. The data are 
also compared to the expectations of different theoretical models.

Parallel sessions: 2 
Plenary sessions: 12