CROSS-SECTIONS OF 3-PARTICLE FINAL-STATE PRODUCTION IN E-, GAMMA-E, AND GAMMA-GAMMA INTERACTIONS AT TEV ENERGIES(E)

It is possible to transform electron (positron) beams of the future ee- colliders into gamma beams with approximately the same energies and luminosities. With the help of the CompHEP system1 we calculate the t otal cross sections in the tree approximation for the production of di fferent three-particle final states in e+e-, gammae(+/-), and gammagam ma collisions in the energy range 0.1-2 TeV. These calculations give u s the basis for comparison of different experimental possibilities wit h electron and gamma beams. In particular, we are interested in the po ssibility of observing various final states at different energies and in a comparison of the numbers of events for different colliding beams .