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T: Fachverband Teilchenphysik
T 67: Neutrinophysik / theoretische Astroteilchenphysik
T 67.2: Vortrag
Mittwoch, 21. März 2018, 16:45–17:00, Z6 - SR 2.011
Gravitinos in Inflation Models — •Sebastian Prenzel — Universität Hamburg, Hamburg, Deutschland
In this talk I try to constrain the mass of the gravitino in two different cases of a NMSSM model embedded in supergravity and consistent with inflation.
I will introduce a Jordan frame Supergravity in which an NMSSM model arising from a superconformal ansatz is embedded. This model will then also be suitable for inflation.
The general assumptions for canonical superconformal supergravity models are presented and how the NMSSM can be constructed from this set of models.
The first case considers a NMSSM model with a hidden sector that determines the gravitino mass. By investigating vacuum and parameter conditions the mass can be constrained to
10MeV m3/2 100GeV.
The second case investigates an NMSSM model without a hidden sector with and without vacuum tuning. Without vacuum tuning it turns out that a hidden sector is necessary to generate soft breaking terms, thus SUSY is broken and the Higgs fields acquire VEV’s. Here the gravitino mass can be constrained to 10−23eV m3/2 10GeV.
Adding an extra term to the superpotential to tune the vacuum generates soft breaking-like terms and thus a hidden sector is not needed to break SUSY and the gravitino mass can be constrained to m3/2 1MeV.