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arXiv · 1506.03321

The Order $\mathcal{O}(α_tα_s)$ Corrections to the Trilinear Higgs Self-Couplings in the Complex NMSSM

M. Muhlleitner·D. T. Nhung·H. Ziesche
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Abstract

A consistent interpretation of the Higgs data requires the same precision in the Higgs boson masses and in the trilinear Higgs self-couplings, which are related through their common origin from the Higgs potential. In this work we provide the two-loop corrections at order ${\cal O}(α_t α_s)$ in the approximation of vanishing external momenta to the trilinear Higgs self-couplings in the CP-violating Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM). In the top/stop sector two different renormalization schemes have been implemented, the OS and the $\overline{\text{DR}}$ scheme. The two-loop corrections to the self-couplings are of the order of 10\% in the investigated scenarios. The theoretical error, estimated both from the variation of the renormalization scale and from the change of the top/stop sector renormalization scheme, has been shown to be reduced due to the inclusion of the two-loop corrections.

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M. Muhlleitner, D. T. Nhung, H. Ziesche. 2015-06-10. The Order $\mathcal{O}(α_tα_s)$ Corrections to the Trilinear Higgs Self-Couplings in the Complex NMSSM. https://doi.org/10.1007/jhep12(2015)034

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