Physics goals and parameters of photon colliders

Abstract

Linear colliders offer a unique possibility to study gamma gamma and gamma electron interactions at the energies 0.1--2 TeV. This option is now included in design reports of NLC, JLC and TESLA/SBLC. This paper includes: status of photon colliders, new possibilities in study of Higgs boson, ways to achieve high luminosities.

Comments: 12 pages, Latex, 8 figures(ps,eps), Proceedings of the 2nd Intern. Workshop on Electron - Electron Interaction at TeV Energies, Santa Cruz, CA, USA, September 22--24, 1997, ed. C.Heusch, Eq.1 is corrected (the corresponding figure was correct)