Two Higgs doublet models augmented by a scalar color octet

Understand

The LHC is now studying in detail the couplings of the Higgs boson in order to determine if there is new physics.

• Many recent studies have examined the available fits to Higgs couplings from the perspective of constraining two Higgs doublet models (2HDM).
• In this paper we extend those studies to include constraints on the one loop couplings of the Higgs to gluons and photons.
• These couplings are particularly sensitive to the existence of new colored particles that are hard to detect otherwise and we use them to constrain a 2HDM augmented with a color-octet scalar, a possibility motivated by minimal flavor violation.