Enhanced $h\rightarrow \gamma \gamma$ rate in MSSM singlet extensions

Article, Preprint English OPEN
Schmidt-Hoberg, Kai ; Staub, Florian (2012)
  • Publisher: SPRINGER
  • Journal: JOURNAL OF HIGH ENERGY PHYSICS (issn: 1126-6708)
  • Related identifiers: doi: 10.1007/JHEP10(2012)195
  • Subject: High Energy Physics - Phenomenology
    arxiv: High Energy Physics::Phenomenology | High Energy Physics::Experiment

We study the di-photon rate in Higgs decays within singlet extensions of the supersymmetric standard model. In particular we point out that light charginos as well as a light charged Higgs can significantly contribute to the corresponding partial decay width, allowing for an explanation of the experimental indication whithin a natural supersymmetric model. This is in contrast to the `light stau scenario' proposed within the framework of the MSSM which requires a large amount of electroweak fine tuning.
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