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外文期刊>The journal of high energy physics
>The order $$ mathcal{O}left({lpha}_t{lpha}_sight) $$ corrections to the trilinear Higgs self-couplings in the complex NMSSM
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The order $$ mathcal{O}left({lpha}_t{lpha}_sight) $$ corrections to the trilinear Higgs self-couplings in the complex NMSSM
A bstract 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 O α t α s $$ mathcal{O}left({lpha}_t{lpha}_sight) $$ 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 D R ˉ $$ overline{mathrm{DR}} $$ 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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