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arXiv · 0808.0087

MSSM Higgs Couplings to Bottom Quarks: Two-Loop Corrections

David Noth·Michael Spira
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Abstract

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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David Noth, Michael Spira. 2008-08-01. MSSM Higgs Couplings to Bottom Quarks: Two-Loop Corrections. https://doi.org/10.1103/physrevlett.101.181801

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