| Hlavná stránka > OPAL Preprints > Total hadronic cross-section of photon-photon interactions at OPAL |
| Article | |
| Title | Total hadronic cross-section of photon-photon interactions at OPAL |
| Author(s) | Wäckerle, F (Fakultät für Phys, Freiburg Univ) |
| Publication | 2000 |
| In: | Nucl. Phys. B, Proc. Suppl. 82 (2000) 232-8 |
| DOI | 10.1016/S0920-5632(00)00158-4 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LEP ; OPAL |
| Abstract | The total hadronic cross-section sigma /sub gamma gamma / for the interaction of real photons, gamma gamma to hadrons, is extracted from a measurement of the cross-section of the process e/sup +/e/sup -/ to e/sup +/e/sup -/ gamma * gamma * to e/sup +/e/sup -/+hadrons using a luminosity function for the photon flux and form factors for extrapolating to Q/sup 2/=0. The data was taken with the OPAL detector at LEP at e/sup +/e/sup -/ centre-of-mass energies square root (s/sub ee/)=161 GeV, 172 GeV and 183 GeV. In the energy range 10<or=W<or=110 GeV the total hadronic gamma gamma cross-section sigma /sub gamma gamma / is consistent with the Regge behaviour of the total cross-section observed in gamma p and hadron-hadron interactions. (23 refs). |