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

The detection of an intermediate mass charged Higgs boson at gammagamm a colliders via the modes gammagamma --> H+H- --> nutau+nutau-BAR, csc sBAR, and nutau+csBAR + csnutau-BAR is considered. W+W- boson pair pro duction is the dominant background for these modes. The three modes ma y 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 sensitiv ity of Br(H+ --> csBAR nutau+) on the discovery limit of the charged H iggs boson is also discussed.