Extended Higgs sector of 2HDM with real singlet facing LHC data

Testing Higgs sector of 2HDM

Properties of the Higgs sector of Two Higgs Doublet Model (2HDM) and existing constraints on its parameters are discussed. Potential of the Photon Linear Collider in testing various Higgs scenarios of 2HDM, including the MSSM, based on the realistic simulations is also presented. 1 Symmetries of the 2HDM [1] The Higgs sector with two scalar complex doublets (Y = ±1) is the simplest yet very ric...

Collider Signatures of Singlet Extended Higgs Sectors

We explore the collider signatures of the Higgs sectors in singlet-extended MSSM models. We find that even with reduced couplings due to singlet mixing, a significant portion of the parameter spaces have a discoverable Higgs via traditional decay modes or via invisible decays (directly to neutralinos or through cascade decays to neutralinos and neutrinos). For illustrative points in parameter s...

CERN LHC phenomenology of an extended standard model with a real scalar singlet

Gauge singlet extensions of the standard model (SM) scalar sector may help remedy its theoretical and phenomenological shortcomings while solving outstanding problems in cosmology. Depending on the symmetries of the scalar potential, such extensions may provide a viable candidate for the observed relic density of cold dark matter or a strong first order electroweak phase transition needed for e...

2HDM Charged Higgs Boson Searches at the LHC: Status and Prospects

Sphalerons in the Standard Model with a real Higgs singlet

Sphaleron energies within the standard model with a real Higgs singlet added on are calculated. The coupled non-linear equations of motion are numerically solved and the sphaleron energy evaluated for a set of parameters in the Higgs potential. I find a small difference in the sphaleron energy compared to the standard model. A slightly stronger constraint on the strength of the first order phas...