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Renormalization of mixing angles
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abstract
We discuss the renormalization of mixing angles for theories with extended scalar sectors. Motivated by shortcomings of existing schemes for mixing angles, we review existing renormalization schemes and introduce new ones based on on-shell conditions or symmetry requirements such as rigid or background-field gauge invariance. Considering in particular the renormalization of the mixing angles in the Two-Higgs-Doublet Model and the Higgs-Singlet Extension of the Standard Model, we compare electroweak corrections within these models for a selection of renormalization schemes. As specific examples, we present next-to-leading-order results on the four-fermion decays of heavy and light CP-even Higgs bosons, $H_1/H_2\to WW/Z Z\to4f$, and on electroweak Higgs-boson production processes, i.e. Higgs-strahlung and vector-boson fusion. We find that our new proposals for on-shell and symmetry-based renormalization conditions are well-behaved for the considered benchmark scenarios in both models.
Forward citations
Cited by 4 Pith papers
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Low-energy effective field theory below the electroweak scale: matching at one loop
The complete one-loop matching equations between the SMEFT and the low-energy EFT below the electroweak scale are derived up to dimension six, including CP-odd operators and theta-angle matching, for general flavor st...
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Renormalization of mixing angles and computation of the hadronic $W$ decay widths
The paper presents first numerical one-loop hadronic W decay widths for an on-shell scheme with δV=0, where off-diagonal mass counterterms replace mixing-angle counterterms.
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Loop-corrected Trilinear Higgs Self-Couplings in the NMSSM with Inverse Seesaw Mechanism
Loop corrections from inverse-seesaw neutrinos and sneutrinos can change the SM-like Higgs self-coupling by up to 10.5% and the SM-like Higgs mass by up to 4.5% in the NMSSM with inverse seesaw.
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New renormalization scheme in extended Higgs sectors for Higgs precision measurements
A new 2HDM renormalization scheme fixes the mixing-angle counterterms so that h to ZZ* and h to tau tau NLO rates equal the tree-level scaled SM rates, giving unambiguous NLO predictions for other Higgs decays.
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