Phenomenology of on-shell Higgs production in the MSSM with complex parameters

Abstract

A computation of inclusive cross sections for neutral Higgs boson production through gluon fusion and bottom-quark annihilation is presented in the MSSM with complex parameters. The predictions for the gluon-fusion process are based on an explicit calculation of the leading-order cross section for arbitrary complex parameters which is supplemented by higher-order corrections: massive top- and bottom-quark contributions at NLO QCD, in the heavy top-quark effective theory the top-quark contribution up to N${}^3$LO QCD including a soft expansion for the $\mathcal{C}\mathcal{P}$-even component of the light Higgs boson. For its $\mathcal{C}\mathcal{P}$-odd component and the heavy Higgs bosons the contributions are incorporated up to NNLO QCD. Two-loop electroweak effects are also incorporated, and SUSY QCD corrections at NLO are interpolated from the MSSM with real parameters. Finite wave function normalisation factors ensuring correct on-shell properties of the external Higgs bosons are incorporated from the code $\text{FeynHiggs}$. For the typical case of a strong admixture of the two heavy Higgs bosons it is demonstrated that squark effects are strongly dependent on the phases of the complex parameters. The remaining theoretical uncertainties for cross sections are discussed. The results have been implemented into an extension of the numerical code $\text{SusHi}$ called $\text{SusHiMi}$.

37 pages, 12 figures, minor clarifications, updated references, matches published version

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Cited by in corpus (12)

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• MSSM Higgs Boson Searches at the LHC: Benchmark Scenarios for Run 2 and Beyond
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• 2HDM Neutral Scalars under the LHC
• MSSM Higgs Benchmark Scenarios for Run 2 and Beyond: the low $\tan \beta$ region
• Strong first order electroweak phase transition in 2HDM confronting future Z & Higgs factories
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry
• Impact of CP-violating interference effects on MSSM Higgs searches
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• EasyScan_HEP: a tool for connecting programs to scan the parameter space of physics models
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• Mixed scalar-pseudoscalar Higgs boson production through next-to-next-to-leading order at the LHC