Abstract
We present a consistent renormalization scheme for the CP-conserving Two-Higgs-Doublet Model based on \( \overline{\mathrm{MS}} \) renormalization of the mixing angles and the soft-Z 2-symmetry-breaking scale M sb in the Higgs sector. This scheme requires to treat tadpoles fully consistently in all steps of the calculation in order to provide gauge-independent S-matrix elements. We show how bare physical parameters have to be defined and verify the gauge independence of physical quantities by explicit calculations in a general R ξ -gauge. The procedure is straightforward and applicable to other models with extended Higgs sectors. In contrast to the proposed scheme, the \( \overline{\mathrm{MS}} \) renormalization of the mixing angles combined with popular on-shell renormalization schemes gives rise to gauge-dependent results already at the one-loop level. We present explicit results for electroweak NLO corrections to selected processes in the appropriately renormalized Two-Higgs-Doublet Model and in particular discuss their scale dependence.
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Denner, A., Jenniches, L., Lang, JN. et al. Gauge-independent \( \overline{\mathrm{MS}} \) renormalization in the 2HDM. J. High Energ. Phys. 2016, 115 (2016). https://doi.org/10.1007/JHEP09(2016)115
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DOI: https://doi.org/10.1007/JHEP09(2016)115