CP-violating loop effects in the MSSM Higgs sector

Higher-order corrections in the Higgs sector of the Minimal Supersymmetric Standard Model (MSSM) are phenomenologically very important. They can drastically change the lowest-order predictions and induce sizable CP-violating effects. Results in the Higgs sector of the MSSM with complex parameters are discussed for propagator-type corrections, for decays of a Higgs boson into two lighter Higgses, and for the production of a light Higgs boson in neutralino decays.