Searching for GeV-scale Majorana Dark Matter: inter spem et metum

Abstract

We suggest a minimal model for GeV-scale Majorana Dark Matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. We show that there is an anti-correlation between the spin-independent DM-Nucleus scattering cross-section (${\sigma }_{\mathrm{SI}}$) and the DM relic density for parameters values allowed by various theoretical and experimental constraints. Moreover, we find that even when DM couplings are of order unity, ${\sigma }_{\mathrm{SI}}$ is below the current experimental bound but above the neutrino floor. Furthermore, we show that the considered model can be probed at high-energy lepton colliders using e.g. the mono-Higgs production and same-sign charged Higgs pair production.

29 pages, 9 figures and 4 Tables. Added section about LHC constraints on the model, improved discussion on the implications at lepton colliders. Comments are welcome!

References in corpus (19)

• Array Programming with NumPy
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• LHAPDF6: parton density access in the LHC precision era
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• From the trees to the forest: a review of radiative neutrino mass models
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Designing and recasting LHC analyses with MadAnalysis 5
• Standard Model anatomy of WIMP dark matter direct detection II: QCD analysis and hadronic matrix elements
• From quarks to nucleons in dark matter direct detection
• Evolution of Universe to the present inert phase
• The low-scale approach to neutrino masses
• Reinterpreting the results of the LHC with MadAnalysis 5: uncertainties and higher-luminosity estimates
• Hunting for Scalar Lepton Partners at Future Electron Colliders
• Phenomenology of the Inert Doublet Model with a global U(1) symmetry
• Proceedings of the second MadAnalysis 5 workshop on LHC recasting in Korea
• Searching for GeV-scale Majorana Dark Matter: inter spem et metum
• Identifying the nature of dark matter at $e^{-}{e}^{+}$ Colliders

Cited by in corpus (8)

• Leptophilic fermion WIMP ~ Role of future lepton colliders
• Lepton portal dark matter at muon colliders: Total rates and generic features for phenomenologically viable scenarios
• Searching for lepton portal dark matter with colliders and gravitational waves
• New Physics Search at the CEPC: a General Perspective
• Searching for GeV-scale Majorana Dark Matter: inter spem et metum
• Interplay of inert doublet and vector-like lepton triplet with displaced vertices at the LHC/FCC and MATHUSLA
• t-channel dark matter at the LHC -- a whitepaper
• Phenomenology of the Hidden SU(2) Vector Dark Matter Model