Search for associated production of massive states decaying into two photons in e+e- annihilations at /sqrt(s)=88-209 GeV

A search is performed for production of short-lived particles in e⁺e^--->XY, with /X-->γγ and /Y-->ff¯, for scalar /X and scalar or vector /Y. Model-independent limits in the range of 25-60 femtobarns are presented on σ(e⁺e^--->XY)×B(X-- >γγ)×B(Y-->ff¯) for centre-of-mass energies in the range 205-207 GeV. The data from all LEP centre-of-mass energies 88-209 GeV are also interpreted in the context of fermiophobic Higgs boson models, for which a lower mass limit of 105.5 GeV is obtained for a ``benchmark'' fermiophobic Higgs boson.