Sneutrino NLSP scenarios in the NUHM with gravitino dark matter

John Ellis, Keith A. Olive, Yudi Santoso

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


We analyze scenarios in which some flavour of sneutrino is the next-to-lightest supersymmetric particle (NLSP), assuming that the gravitino is the lightest supersymmetric particle (LSP) and provides the cold dark matter. Such scenarios do not arise in the constrained supersymmetric extension of the Standard Model (CMSSM) with universal gaugino and scalar masses input at the GUT scale. However, models with non-universal Higgs masses (NUHM) do allow scenarios with a sneutrino NLSP, which are quite generic. We illustrate how such scenarios may arise, analyze the possible metastable sneutrino lifetime, and explore the theoretical, phenomenological, experimental and cosmological constraints on such scenarios. We also discuss the collider signatures of such scenarios, how they may be distinguished from neutralino LSP scenarios, and how different flavours of sneutrino NLSP may be distinguished.

Original languageEnglish (US)
Article number005
JournalJournal of High Energy Physics
Issue number10
StatePublished - Oct 1 2008


  • Cosmology of theories beyond the SM
  • Supersymmetry phenomenology

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