Multi - Higgs Doublet Model : Can It Account for l + l − γγ Events ?

Motivated by recent experiments at LEP (Z → l + l − γγ, with M γγ ≃ 59GeV), we examine the possibility that such events are explained by a Bjorken process with a resonant Higgs (M h o ≃ 59GeV) decaying to γγ. Our model is an N-doublet-Higgs model without CP-violation. Under the simplifying assumption that (N − k) doublets (k ≥ 1) decouple from the fermion sector, we could explain the observed events if: i) (N − 1) ≥ 2 and ii) the masses of the corresponding (N − 1) neutral scalars are either completely or almost degenerate, i. e. the decay Z → l + l − γγ proceeds now via several overlapping resonances.