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arXiv · hep-ph/0611326

The Higgs Boson Masses and Mixings of the Complex MSSM in the Feynman-Diagrammatic Approach

M. Frank·T. Hahn·S. Heinemeyer·W. Hollik·H. Rzehak·G. Weiglein
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Abstract

New results for the complete one-loop contributions to the masses and mixing effects in the Higgs sector are obtained for the MSSM with complex parameters using the Feynman-diagrammatic approach. The full dependence on all relevant complex phases is taken into account, and all the imaginary parts appearing in the calculation are treated in a consistent way. The renormalization is discussed in detail, and a hybrid on-shell/DRbar scheme is adopted. We also derive the wave function normalization factors needed in processes with external Higgs bosons and discuss effective couplings incorporating leading higher-order effects. The complete one-loop corrections, supplemented by the available two-loop corrections in the Feynman-diagrammatic approach for the MSSM with real parameters and a resummation of the leading (s)bottom corrections for complex parameters, are implemented into the public Fortran code FeynHiggs2.5. In our numerical analysis the full results for the Higgs-boson masses and couplings are compared with various approximations, and CP-violating effects in the mixing of the heavy Higgs bosons are analyzed in detail. We find sizable deviations in comparison with the approximations often made in the literature.

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M. Frank, T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak, G. Weiglein. 2007-01-29. The Higgs Boson Masses and Mixings of the Complex MSSM in the Feynman-Diagrammatic Approach. https://doi.org/10.1088/1126-6708%2F2007%2F02%2F047

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