Multi-lepton signatures at LHC from sneutrino dark matter

Abstract

We investigate multi-lepton LHC signals arising from an extension at the grand unification scale of the standard minimal supersymmetric model (MSSM) involving right-handed neutrino superfields. In this framework neutrinos have Dirac masses and the mixed sneutrinos are the lightest supersymmetric particles and hence the dark matter candidates. We analyze the model parameter space in which the sneutrino is a good dark matter particle and has a direct detection cross-section compatible with the LUX bound. Studying the supersymmetric mass spectrum of this region, we find several signatures relevant for LHC, which are distinct from the predictions of the MSSM with neutralino dark matter. For instance two opposite sign and different flavor leptons, three uncorrelated leptons and long-lived staus are the most representative. Simulating both the signal and expected background, we find that the multi-lepton signatures and the long-lived stau are in the reach of the future run of LHC with a luminosity of 100/fb. We point out that if one of these signatures is detected, it might be an indication of sneutrino dark matter.

34 pages, 14 figures and 6 tables; this version matches the published one

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Cited by in corpus (20)

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• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• Naturalness of the relaxion mechanism
• A Bayesian analysis of sneutrino DM in the NMSSM with Type-I seesaw mechanism
• Signatures of sneutrino dark matter in an extension of the CMSSM
• Constraints on sneutrino dark matter from LHC Run 1
• Muon g-2 in Focus Point SUSY
• Sneutrino DM in the NMSSM with inverse seesaw mechanism
• Bayesian analysis and naturalness of (Next-to-)Minimal Supersymmetric Models
• Simplified Supersymmetry with Sneutrino LSP at 8 TeV LHC
• A light sneutrino rescues the light stop
• Resonant slepton production and right sneutrino dark matter in left-right supersymmetry
• Monochromatic neutrino lines from sneutrino dark matter
• Phenomenological constraints on light mixed sneutrino dark matter scenarios
• Natural SUSY at LHC with Right-Sneutrino LSP
• Same-sign trilepton signal for stop quark in the presence of sneutrino dark matter
• Distinguishing Neutrino Mass Hierarchies using Dark Matter Annihilation Signals at IceCube
• Two-loop radiative seesaw, muon $g-2$, and $\tau$-lepton-flavor violation with DM constraints
• Gauge Mediation at LHC: status and prospects
• Multilepton Signatures from Dark Matter at the LHC