Resonant production of heavy MSSM Higgs bosons at the Photon Collider

Assuming a light Higgs boson is discovered, its nature can remain unknown in case that no supersymmetric particles are found. The detection and study of heavier Higgs particles is then of great interest. For this purpose the Compton-collider option of a high energy e+e- linear collider is optimal both to produce Higgs bosons and to reveal their CP-parity. Assuming realistic photon luminosities for various configurations of laser and linac polarizations, we study the heavy, neutral MSSM Higgs signals for the most relevant decay modes as well as their corresponding backgrounds. The MSSM H and A Higgs bosons with masses up to a ~80% of the linac c.m.s. energy may be observed and their CP-parity tested for Higgs masses ~450 GeV, at the gamma-gamma mode of a ~1 TeV linear collider