Interpretation of the Search for Neutral Higgs Bosons at OPAL in a CP Violating MSSM Scenario

This article describes preliminary results of a search for neutral Higgs bosons within a CP violating Minimal Supersymmetric Model (MSSM). The results are based on the complete dataset collected with the OPAL detector at LEP with centre-of-mass energies ranging from √ {s} = 91 to 209 GeV. The searches for the Standard Model Higgs boson and for the neutral Higgs bosons in the CP-conserving MSSM are re-interpreted and extended. The dominant production mechanisms, Higgsstrahlung and Higgs boson pair production, are considered for the lightest (H₁) and the next-to-lightest (H₂) neutral Higgs mass eigenstates. No significant excess over the expected SM background was observed. Regions in the parameter space of a CP violating benchmark scenario are excluded.