Abstract
We explore the possibilities in two-Higgs-doublet models of type I and type II for Higgs states with mass below about 60 GeV, i.e. less than half of the mass of the observed SM-like Higgs boson. We identify the latter as either the lighter or the heavier -even state, or , and employ scans of the two-Higgs-doublet model parameter space taking into account all relevant theoretical and experimental constraints, including the most up-to-date Higgs signal strength measurements. We find that, in both type I and type II models, such light Higgs states are phenomenologically viable and can lead to interesting signatures. Part of the relevant parameter space may be testable with the existing 8 TeV LHC data, e.g. by looking for direct production of the light state via fusion or associated production using its and decays at low invariant mass.
8 More- Received 23 January 2015
DOI:https://doi.org/10.1103/PhysRevD.91.075019
© 2015 American Physical Society