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

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arxiv hep-ph/0611326 v2 pith:PVZCB2IO submitted 2006-11-27 hep-ph

M. Frank , T. Hahn , S. Heinemeyer , W. Hollik , H. Rzehak , G. Weiglein This is my paper
classification hep-ph
keywords complexhiggsapproachcorrectionseffectsfeynman-diagrammaticmassesmssm
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Cited by 2 Pith papers

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  1. Light Neutral Higgs-Boson Production at $e^+e^-$ Colliders in the Complex MSSM and NMSSM: A Full One-Loop Analysis

    hep-ph 2025-07 conditional novelty 6.0 of 10

    First full one-loop computation of e+e- -> h1 Z in the cNMSSM: corrections near -10%, nearly identical to the MSSM once the light Higgs mass is fixed.

  2. Quark-universal $U(1)$ breaking scalar at the LHC

    hep-ph 2025-06 conditional novelty 6.0 of 10

    In a quark-universal U(1)_B model, the scalar φ that breaks the symmetry can be discovered first through its diphoton decay, and its rate can explain the 95 GeV diphoton excess.

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