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JHEP 12, 034 (2015)

ISSN: 1029-847, SCI

The order O(𝛼_t𝛼_s) corrections to the trilinear Higgs self-couplings in the complex NMSSM

Margarete Muhlleitner, Dao Thi Nhung and Hanna Zieschea

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( t s) in the approximation of vanishing external momenta to the trilinear Higgs selfcouplings in the CP-violating Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM). In the top/stop sector two di erent renormalization schemes have been implemented, the OS and the 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.

DOI: 10.1007/JHEP12(2015)034

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