Sneutrino DM in the NMSSM with inverse seesaw mechanism
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In this paper, the authors extend the NMSSM by inverse seesaw mechanism to generate neutrino mass, and show that in certain parameter space the lightest sneutrino may act as a viable dark matter candidate, i.e. it can annihilate by multi-channels to get correct relic density and meanwhile satisfy all experimental constraints.Abstract:
In supersymmetric theories like the Next-to-Minimal Supersymmetric Standard Model (NMSSM), the lightest neutralino with bino or singlino as its dominant component is customarily taken as dark matter (DM) candidate. Since light Higgsinos favored by naturalness can strength the couplings of the DM and thus enhance the DM-nucleon scattering rate, the tension between naturalness and DM direct detection results becomes more and more acute with the improved experimental sensitivity. In this work, we extend the NMSSM by inverse seesaw mechanism to generate neutrino mass, and show that in certain parameter space the lightest sneutrino may act as a viable DM candidate, i.e. it can annihilate by multi-channels to get correct relic density and meanwhile satisfy all experimental constraints. The most striking feature of the extension is that the DM-nucleon scattering rate can be naturally below its current experimental bounds regardless of the higgsino mass, and hence it alleviates the tension between naturalness and DM experiments. Other interesting features include that the Higgs phenomenology becomes much richer than that of the original NMSSM due to the relaxed constraints from DM physics and also due to the presence of extra neutrinos, and that the signatures of sparticles at colliders are quite different from those with neutralino as DM candidate.read more
Citations
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Current status of a natural NMSSM in light of LHC 13 TeV data and XENON-1T results
TL;DR: In this article, the authors explore the constraints from the direct searches for electroweakino and slepton at the LHC Run II and the latest DM direct detection experiments on the scenario with low fine tuning indicator.
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Suppressing the scattering of WIMP dark matter and nucleons in supersymmetric theories
TL;DR: In this article, the authors show that weakly interacting massive particles (such as the sneutrino in this study) work well in supersymmetric theories as dark matter candidates.
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Electron and muon anomalous magnetic moments in the inverse seesaw extended NMSSM
TL;DR: In this paper, the inverse seesaw extended next-to-minimal supersymmetric standard model by the Higgsino-sneutrino contributions to electron anomalous magnetic moment was presented.
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96 GeV diphoton excess in seesaw extensions of the natural NMSSM
TL;DR: The next-to minimal supersymmetric standard model (NMSSM) with a Type-I seesaw mechanism extends the NMSSM by three generations of right-handed neutrino fields to generate neutrinos mass.
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Anomalous muon magnetic moment in the inverse seesaw extended next-to-minimal supersymmetric standard model
TL;DR: In this paper, the authors investigated the possibility that both dark matter and the anomalous magnetic moment of the muon may be explained within the context of the inverse seesaw extended next-to-minimal supersymmetric standard model (ISS-NMSSM).
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