The knowledge of the interactions of photons with hadrons has considerably improved with the study of high-energy lepton-proton collisions at HERA. The results on the partonic interactions of photons are summarized in comparison with photon-nucleon, two-photon, and proton-antiproton experiments.

Autorentext
Martin Erdmann ist Professor für Experimentalphysik am Physikalischen Institut der RWTH Aachen.

Inhalt
Predictions for hard photon interactions.- Two-? physics: Deep inelastic lepton-photon scattering.- Photon-proton interactions at HERA.- Status and future.