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T: Fachverband Teilchenphysik
T 86: Higgs Physik (Theorie) 2
T 86.1: Vortrag
Mittwoch, 29. März 2017, 16:45–17:00, VSH 06
On the Renormalization of the 2HDM — •Marcel Krause — Karlsruher Institut für Technologie (KIT), Institut für Theoretische Physik (ITP), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe
The Two-Higgs-Doublet Model (2HDM) is one of the simplest extensions of the Higgs sector of the Standard Model (SM) of particle physics. In order to investigate experimental data from particle colliders and to distinguish between different extensions of the SM, precise predictions for Higgs observables are required. This necessitates also the consideration of next-to-leading order (NLO) contributions to Higgs decays as well as their renormalization. Desirable properties of any renormalization scheme that is used in practice are process-independence, gauge-independence and numerical stability of the NLO contributions. Based on several exemplary Higgs decays within the 2HDM, we compare different renormalization schemes and propose a scheme which fulfills all three desirable properties. We pay special attention to the scalar mixing angle α for the CP-even Higgs bosons and the mixing angle β for the CP-odd and charged Higgs bosons, as well as to the Z2-symmetry-breaking mass term m12.