Apr 19 – 21, 2017
Trieste - Italia
Europe/Rome timezone
Proceedings: Il Nuovo Cimento C, Vol. 41, N. 1-2, 2018 : https://www.sif.it/riviste/sif/ncc/econtents/2018/041/01-02

Extended Higgs Sector @ LHC

Apr 19, 2017, 3:50 PM
Aula Magna - Edificio H3 (Trieste - Italia)

Aula Magna - Edificio H3

Trieste - Italia

Università degli Studi di Trieste Via Valerio nº 12/2 I-34127 Trieste (TS)
Oral contribution Sessione Frontiera Energia Sessione Frontiera Energia


Mr Antonio Costantini (Università del Salento - INFN Lecce)


We investigate the scalar sector in an extension of the Minimal Supersymmetric Standard Model (MSSM) containing a SU(2) Higgs triplet of zero hypercharge and a gauge singlet. In particular, we focus on a scenario of this model which allows a light pseudoscalar, lighter than the discovered Higgs boson, consistent with the most recent data from the LHC and the earlier data from the LEP experiments. Such an extra hidden Higgs boson, if exist, will then decays into lighter fermion pairs. Apart from the neutral Higgs bosons, we investigate in great detail the charged Higgs bosons of this model. Specifically, we search for their new decay modes in order to distinguish between Higgs fields belonging to SU(2) doublet and triplet representations and also to show the existence of a light pseudoscalar which belong to the singlet representation. Finally we consider a classical scale/conformal invariant extension of the Standard Model and we investigate the production and decay of the dilaton. The breaking scale of the scale/conformal symmetry is constrained with the bounds derived from Higgs boson searches at the LHC.

Primary author

Mr Antonio Costantini (Università del Salento - INFN Lecce)

Presentation materials