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In this paper we discuss the production of a heavy scalar MSSM Higgs boson Hand its subsequent decays into pairs of electroweak gauge bosons WW and ZZ. Weperform a scan over the relevant MSSM parameters, using constraints from directHiggs searches and several low-energy observables. We then compare the possiblesize of the pp -> H -> WW,ZZ cross sections with corresponding Standard Modelcross sections. We also include the full MSSM vertex corrections to the H ->WW,ZZ decay and combine them with the Higgs propagator corrections, payingspecial attention to the IR-divergent contributions. We find that the vertexcorrections can be as large as -30% in MSSM parameter space regions which arecurrently probed by Higgs searches at the LHC. Once the sensitivity of thesesearches reaches two percent of the SM signal strength the vertex correctionscan be numerically as important as the leading order and Higgs self-energycorrections and have to be considered when setting limits on MSSM parameters.

Heavy MSSM Higgs production at the LHC and decays to WW,ZZ at higher orders