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arXiv · 1308.2678

NMSSM with Gravitino Dark Matter to be tested at LHC

Jasper Hasenkamp·Martin Wolfgang Winkler
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Abstract

We present a solution to the gravitino problem, which arises in the NMSSM, allowing for sparticle spectra from ordinary gravity-mediated supersymmetry breaking with weak-scale gravitino dark matter. The coupling, which links the singlet to the MSSM sector, enhances the tree-level Higgs mass, providing an attractive explanation why the observed Higgs boson is so heavy. The same coupling induces very efficient pair-annihilation processes of the neutralino NLSP. Its relic abundance can be sufficiently suppressed to satisfy the strong constraints on late decaying relics from primordial nucleosynthesis -- even for very long neutralino lifetimes. The striking prediction of this scenario is the detection of a pseudoscalar Higgs boson in the search for top-top resonances at LHC-14, rendering it completely testable.

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Jasper Hasenkamp, Martin Wolfgang Winkler. 2013-08-12. NMSSM with Gravitino Dark Matter to be tested at LHC. https://doi.org/10.1016/j.nuclphysb.2013.10.017

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