Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter

Details Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter

2008-07-23

arxiv.org/abs/0807.3736v1

JHEP 0810:005,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 13 eps figures

Scientific paper

10.1088/1126-6708/2008/10/005

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.

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