DETECTING AN INTERMEDIATE-MASS CHARGED HIGGS AT GAMMA-GAMMA-COLLIDERS

The detection of an intermediate mass charged Higgs boson at gammagamma colliders via the modes gammagamma --> H+H- --> nutau+nutau-BAR, cscsBAR, and nutau+csBAR + csnutau-BAR is considered. W+W- boson pair production is the dominant background for these modes. The three modes may be used in a complementary fashion to detect a charged Higgs boson. The mixed leptonic-hadronic mode may be used to determine the charged Higgs mass by reconstructing the invariant hadronic mass. The sensitivity of Br(H+ --> csBAR nutau+) on the discovery limit of the charged Higgs boson is also discussed.