Searches for MSSM Higgs Bosons with the DELPHI detector up to $\sqrt{s}$=209 GeV

Searches for hA pair production and hZ production have been performed. Special emphasis has been put on searches, in which the Higgs can decay invisibly into neutralinos. The data collected by the DELPHI experiment at centre-of-mass energies between 191.6 and 201.7 GeV for the year 1999 and between 201.7 and 209.0 GeV for the ongoing data taking in 2000 has been used. These analyses are used, in combination with our results at lower energies, to set 95% confidence levels on the existence of a light neutral Higgs Boson h and a neutral pseudoscalar Higgs Boson A in a mass range of 85-115 GeV/c /sup 2/. Combining the searches for visible and invisible Higgs decays allows to obtain 95% confidence levels on the existence of h independent of the branching ratio into invisible decays, if the visible decays are taken to be the SM ones. The MSSM parameter space excluded by these searches has been determined. (9 refs).