Alignment, reverse alignment, and wrong sign Yukawa couplings in two Higgs doublet models

We consider two Higgs doublet models with a softly broken U(1) symmetry, for various limiting values of the scalar mixing angles [alpha] and [beta]. These correspond to the Standard Model Higgs particle being the lighter CP-even scalar (alignment) or the heavier CP-even scalar (reverse alignment), a...

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Bibliographic Details
Published in:Physical review. D 2016-06, Vol.93 (11), Article 115017
Main Authors: Biswas, Ambalika, Lahiri, Amitabha
Format: Article
Language:English
Subjects:
Alignment
Constraining
Cosmology
Couplings
Decay
Mathematical analysis
Mathematical models
Scalars
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Summary:We consider two Higgs doublet models with a softly broken U(1) symmetry, for various limiting values of the scalar mixing angles [alpha] and [beta]. These correspond to the Standard Model Higgs particle being the lighter CP-even scalar (alignment) or the heavier CP-even scalar (reverse alignment), and also the limit in which some of the Yukawa couplings of this particle are the opposite sign of the vector boson couplings (wrong sign). In these limits we impose a criterion for naturalness by demanding that quadratic divergences cancel at one loop. We plot the allowed masses of the remaining physical scalars based on naturalness, stability, perturbative unitarity, and constraints coming from the [rho] parameter. We also calculate the h[arrowright][gamma][gamma] decay width in the wrong sign limit.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.93.115017