LHC Tests of Light Neutralino Dark Matter without Light Sfermions

Abstract

We address the question how light the lightest MSSM neutralino can be as dark matter candidate in a scenario where all supersymmetric scalar particles are heavy. The hypothesis that the neutralino accounts for the observed dark matter density sets strong requirements on the supersymmetric spectrum, thus providing an handle for collider tests. In particular for a lightest neutralino below 100 GeV the relic density constraint translates into an upper bound on the Higgsino mass parameter $\mu$ in case all supersymmetric scalar particles are heavy. One can define a simplified model that highlights only the necessary features of the spectrum and their observable consequences at the LHC. Reinterpreting recent searches at the LHC we derive limits on the mass of the lightest neutralino that, in many cases, prove to be more constraining than dark matter experiments themselves.

22 pages, 8 figures

References in corpus (4)

• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• The Well-Tempered Neutralino
• Neutralino Dark Matter at 14 and 100 TeV
• Higgs boson to di-tau channel in Chargino-Neutralino searches at the LHC

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• Prospects for dark matter searches in the pMSSM
• The Relic Neutralino Surface at a 100 TeV collider
• Hunting electroweakinos at future hadron colliders and direct detection experiments
• Status of low mass LSP in SUSY
• Singlino-dominated dark matter in $Z_3$-NMSSM
• Status of the singlino-dominated dark matter in general Next-to-Minimal Supersymmetric Standard Model
• A relatively light, highly bino-like dark matter in the $Z_3$-symmetric NMSSM and recent LHC searches
• Alignment without Decoupling: the Portal to Light Dark Matter in the MSSM
• Status of ${\mathbb{Z}}_3$-NMSSM featuring a light bino-dominated LSP and a light singlet-like scalar under the LZ Experiment
• Light right-handed Smuons at the LHC: Natural dark matter and $g_{\mu }-2$ in an unexplored realm of the pMSSM