`Phenomenological aspects of the UMSSM'

Abstract:
The Minimal Supersymmetric Standard Model (MSSM) has been extensively studied
throughout last decades and gave a large variety of predictions thanks to for
instance its Higgs boson sector, its sparticle sector or its Dark Matter (DM)
sector. It has nevertheless several drawbacks as the mu-problem or the tension
between a 125 GeV SM-like Higgs boson and a low tan beta value. The
Next-to-MSSM (NMSSM) can address these issues. Another approach is the addition
of a new U(1) Abelian gauge symmetry. In this context we will develop some
aspects of U(1) extensions of the MSSM (UMSSM). First we will look at the study
of a scalar DM candidate in this model, the right-handed sneutrino. Then we
will look at some phenomenological aspects of its Higgs sector.