1209.5725 (Bogumila Swiezewska)

Yukawa independent constraints for 2HDMs with a 125 GeV Higgs boson    [PDF]

Bogumila Swiezewska

In this paper perturbative unitarity constraints for the parameter spaces of two variants of Two Higgs Doublet Model with a Z_2-symmetric potential are reconsidered, including the latest LHC data on existence of a 125 GeV Higgs boson. The analysis does not depend on the Yukawa interactions. We focus on the model in which only one of the doublets develops a non-zero vacuum expectation value (vev) - the Inert Doublet Model (IDM) and the Mixed Model where both of the doublets have non-zero vevs. Positivity constraints, perturbative unitarity condition and the constraints following from electroweak precision tests together with conditions determining type of the vacuum are included in the analysis. Bounds on quartic parameters of the potential, which are universal for both of the models, are given. For the IDM constraints on quartic couplings and masses of scalars as well as their implications for Dark Matter scenarios are presented. In the Mixed Model a bound on the value of tan\beta, 0.18View original: http://arxiv.org/abs/1209.5725