Experimental signatures of fermiophobic Higgs bosons

The most general Two Higgs Doublet Model potential without explicit CP viol ation depends on 10 real independent parameters. Excluding spontaneous CP v iolation results in two 7 parameter models. Although both models give rise to 5 scalar particles and 2 mixing angles, the resulting phenomenology of t he scalar sectors is different. If flavour changing neutral currents at tre e level are to be avoided, one has, in both cases, four alternative ways of introducing the fermion couplings. In one of these models the mixing angle of the CP even sector can be chosen in such a way that the fermion couplin gs to the lightest scalar Higgs boson vanishes. At the same time it is poss ible to suppress the fermion couplings to the charged and pseudo-scalar Hig gs bosons by appropriately choosing the mixing angle of the CP odd sector. We investigate the phenomenology of both models in the fermiophobic limit a nd present the different branching ratios for the decays of the scalar part icles. We use the present experimental results from the LEP collider to con strain the models.