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

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

2006-11-27

arxiv.org/abs/hep-ph/0611326v2

JHEP 0702:047,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

57 pages, 12 figures. Discussion about decoupling properties added, references added. Version to appear in JHEP

Scientific paper

10.1088/1126-6708/2007/02/047

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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