Hiding the little hierarchy problem in the NMSSM

Link:
Autor/in:
Erscheinungsjahr:
2015
Medientyp:
Text
Schlagworte:
  • Standard model (particle physics)
  • Mass
  • Gaugino masses
  • Decay
  • Quarks
  • Neutrinos
  • Standard model (particle physics)
  • Mass
  • Gaugino masses
  • Decay
  • Quarks
  • Neutrinos
Beschreibung:
  • In this paper we consider a set of soft supersymmetry breaking terms within the NMSSM which leads to a small hierarchy between the supersymmetry breaking scale and the electroweak scale. Specifically only the gaugino masses and the soft term in the Higgs sector are non-vanishing at the GUT scale. This pattern can be found in gaugino mediated models and in higher-dimensional orbifold GUTs. We study the phenomenology of this scenario and find different low energy spectra depending on the Yukawa coupling lambda of the NMSSM singlet. In particular, for low values of lambda the singlet is the lightest scalar and the singlino is the LSP while for large values of lambda both are heavy and the gravitino can be the LSP. The singlet pseudoscalar is very light in a broad range of the parameter space.
Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH

Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/241ae456-1abf-4256-ab94-f630a2e9cec2