Higgs properties in the Stealth Doublet Model

Abstract

I present a model with two scalar doublets and a softly broken $\text{ztwo}$ symmetry, where only one of the doublets gets a vacuum expectation value and couples to fermions at tree-level. The softly broken $\text{ztwo}$ symmetry leads to interesting phenomenology such as mixing between the two doublets and a charged scalar H^\pm which can be light and dominantly decays into W \gamma. The model can also naturally reproduce an enhanced \gamma \gamma signal of the newly observed Higgs boson at the LHC with mass 125 GeV.

Comments: arXiv version of LHCP 2013 conference proceedings