Yukawa independent constraints for Two Higgs Doublet Models with a 125 GeV Higgs boson

Understand

In this paper various constraints for the parameter spaces of two variants of the Two Higgs Doublet Model with a Z_2-symmetric potential are reconsidered, including the LHC data on existence of a 125 GeV Higgs-like boson.

• We analyze the model in which only one of the doublets develops a nonzero vacuum expectation value (VEV) -- the Inert Doublet Model (IDM) and the Mixed Model where both of the doublets have nonzero VEVs.
• Positivity constraints, conditions determining the type of the vacuum, perturbative unitarity condition, constraints following from electroweak precision tests together with the LEP bounds on masses of the scalars are included in the analysis.
• The analysis is performed without specific assumptions regarding the Yukawa sector.