The Higgs boson spectrum of the Next-to-Minimal Supersymmetric Standard Model is examined. The model includes a singlet Higgs field S in addition to the two Higgs doublets of the minimal extension. 'Natural' values of the parameters of the model are motivated by their renormalization group running and the vacuum stability. The qualitative features of the Higgs boson masses are dependent on how ...

Little experimental data bears on the question of whether there is a spontaneously broken hidden sector that has no Standard Model quantum numbers. Here we discuss the prospects of finding evidence for such a hidden sector through renormalizable interactions of the Standard Model Higgs boson with a Higgs boson of the hidden sector. We find that the lightest Higgs boson in this scenario has smal...

A complete study of the Higgs sector of the SU(3)c ⊗ SU(3)L ⊗ U(1)X model is carried out, obtaining all possible cases of vacuum expectation values that permit the spontaneous symmetry breaking pattern SU(3)L ⊗U(1)X → SU(2)L ⊗ U(1)Y → U(1)Q. We find the most general Higgs potentials that contain three triplets of Higgs and one sextet. A detailed study of the scalar sector for different models w...

We discuss the prospects for the discovery of neutral Higgs bosons (φ 0 = H 0 , h 0 , A 0) in multi-Higgs doublet models via their decays into leptons at hadron colliders. A major focus will be searching for Higgs bosons produced with bottom quarks via Higgs decays into muon pairs (pp → b ¯ bφ 0 → b ¯ bµ¯ µ + X) at the CERN Large Hadron Collider within the framework of the minimal supersymmetri...

We review the phenomenology of light Higgs scalars in supersymmetric left-right models. We consider models with minimal particle content (with and without non-renormalizable higher-dimensional terms) and with additional Higgs superfields. The upper bound on the lightest CP -even neutral Higgs boson in these models is larger than in the minimal supersymmetric standard model, and the Higgs coupli...

We argue that multiple point principle (MPP) can be used to ensure CP conservation and the absence of flavour changing neutral currents within the two Higgs doublet model (2HDM). We also discuss Higgs phenomenology in the MPP inspired 2HDM. PACS. 12.60.Fr Extensions of electroweak Higgs sector – 14.80.Bn Standard-model Higgs bosons