The N2HDM under Theoretical and Experimental Scrutiny

Understand

The N2HDM is based on the CP-conserving 2HDM extended by a real scalar singlet field.

• Its enlarged parameter space and its fewer symmetry conditions as compared to supersymmetric models allow for an interesting phenomenology compatible with current experimental constraints, while adding to the 2HDM sector the possibility of Higgs-to-Higgs decays with three different Higgs bosons.
• In this paper the N2HDM is subjected to detailed scrutiny.
• Regarding the theoretical constraints we implement tests of tree-level perturbativity and vacuum stability.