Conveners
WG1: joined HTE & SRCH session
- Roberto Franceschini (CERN)
- Karsten Koeneke (Uni Freiburg)
Extension of the Two Higgs Doublet model augmented with a complex scalar singlet (2HDMS) is a well motivated candidate for Beyond Standard Model (BSM) Physics. In this talk, we focus on the dark matter (DM) phenomenology of 2HDMS and investigate cases where the singlet doesnot obtain a vacuum expectation value (vev) and act as the DM candidate. We also consider the case where the singlet...
We investigate the prospects for producing new, light, hidden states at a future $e^+e^-$ collider in a Higgsed dark $U(1)_D$ model, (the Double Dark Portal model). The simultaneous presence of both vector and scalar portal couplings immediately modifies the SM $e^+e^-\to Zh$ process at leading order in each coupling. After accounting for current constraints, we demonstrate that a future Higgs...
We analyze the parameter space allowed in the Two Higgs Doublet Model (2HDM) with respect to all current experimental and theoretical constraints. We show the allowed ranges for the various triple Higgs couplings, depending on the Yukawa type of the model. We discuss the accessibility of BSM triple Higgs couplings at the ILC and CLIC.
We discuss the mounting evidence for a 95 GeV Higgs boson, as well as interesting excesses in the searches for heavier Higgs bosons at $\sim$ 400 GeV. We show how these excesses can described in the Two Higgs Doublet Model plus real singlet (N2HDM), or in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We discuss the physics potential of future $e^+e^-$ colliders to analyze these scenarios.
LHC has discovered a light boson h(125), residual of EWSB in the SM and no heavy particle. More generally, one can assume that scalars due to BSM symmetry breaking mechanisms are likely to be the lightest particles produced at LHC and the only new particles reachable at future lepton colliders. From a systematic survey of LHC data, I conclude that there are 4 likely candidates, all reaching a...
