ON EXCLUSIVE REACTIONS IN THE TIME-LIKE REGION

The electromagnetic form factors of the proton in the time-like region and two-photon annihilations into proton-antiproton are investigated. To calculate these processes at moderately large s we use a variant o f the Brodsky-Lepage hard-scattering formalism where diquarks are cons idered as quasi-elementary constituents of baryons. The proton wave fu nction and the parameters controlling the diquark contributions are de termined from fits to space-like data. We also comment on the decay et a(c) --> ppBAR.