NMSSM with gravitino dark matter to be tested at LHC |
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| Authors: | Jasper Hasenkamp Martin Wolfgang Winkler |
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| Affiliation: | 1. Center for Cosmology and Particle Physics, New York University, New York, NY, USA;2. II Institute for Theoretical Physics, University of Hamburg, Hamburg, Germany;3. Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany |
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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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