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MSSM Higgs Couplings to Bottom Quarks: Two-Loop Corrections

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arxiv 0808.0087 v1 pith:WEDVLXSB submitted 2008-08-01 hep-ph

David Noth , Michael Spira This is my paper · ORCID
classification hep-ph
keywords correctionscouplingssusy-qcdtwo-loopyukawabottomdeltaeffective
verification ladder T0 review T1 audit T2 compute T3 formal
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We present the two-loop SUSY-QCD corrections to the effective bottom Yukawa couplings within the minimal supersymmetric extension of the Standard Model. The effective Yukawa couplings include the resummation of the non-decoupling corrections Delta m_b for large values of tg(beta). We have derived the two-loop SUSY-QCD corrections to the leading SUSY-QCD and top-induced SUSY-electroweak contributions to Delta m_b. The scale dependence of the resummed Yukawa couplings is reduced from O(10%) to the per-cent level. These results reduce the theoretical uncertainties of the MSSM Higgs branching ratios to the accuracy which can be achieved at a future linear e+e- collider.

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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.

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