2HDM with Z_2 symmetry in light of new LHC data

TL;DR

This paper examines Z_2-symmetric Two Higgs Doublet Models in light of recent LHC data, analyzing their compatibility with a 125 GeV Higgs and implications for dark matter candidates.

Contribution

It provides a detailed confrontation of Z_2-symmetric 2HDMs with LHC data, exploring SM-like Higgs scenarios and dark matter implications within these models.

Findings

SM-like Higgs scenarios are compatible with LHC data in 2HDMs with Z_2 symmetry.

Inert Doublet Model offers a viable dark matter candidate consistent with observations.

Enhanced two-photon Higgs decay channel can be accommodated in these models.

Abstract

Properties of the Z_2-symmetric Two Higgs Doublet Models (2HDM) are discussed and confronted with new LHC data for a 125 GeV Higgs particle. The particle discovered at LHC in 2012 has properties expected for it in the Standard Model (SM), with a possible enhancement in the two-photon channel. SM-like Higgs scenarios can be realized in the Two Higgs Doublet Models with Z_2 (D) symmetry within the normal Mixed Model (with scalar sector as in MSSM) and the Inert Doublet Model (IDM), where a good Dark Matter (DM) candidate is present. Here we discuss both of the models.