Explorations of pseudo-Dirac dark matter having keV splittings and interacting via transition electric and magnetic dipole moments

Abstract

We study a minimal model of pseudo-Dirac dark matter, interacting through transition electric and magnetic dipole moments. Motivated by the fact that xenon experiments can detect electrons down to $\sim$\,keV recoil energies, we consider $\mathcal{O}$(keV) splittings between the mass eigenstates. We study the production of this dark matter candidate via the freeze-in mechanism. We discuss the direct detection signatures of the model arising from the down-scattering of the heavier state, that are produced in Solar upscattering, finding observable signatures at the current and near-future xenon based direct detection experiments. We also study complementary constraints on the model from fixed target experiments, lepton colliders, supernovae cooling and cosmology. We show that the latest XENONnT results rule out parts of the parameter space for this well motivated and minimal dark matter candidate. Next generation xenon experiments can either discover or further constrain how strongly inelastic dark matter can interact via the dipole moment operators.

50 pages, 14 figures. Updated to include XENONnT results. Matches published version

References in corpus (13)

• New Fixed-Target Experiments to Search for Dark Gauge Forces
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Search for New Physics in Electronic Recoil Data from XENONnT
• Making dark matter out of light: freeze-in from plasma effects
• On electromagnetic contributions in WIMP quests
• How Dark Are Majorana WIMPs? Signals from MiDM and Rayleigh Dark Matter
• Dipolar Dark Matter
• Inelastic Dark Matter Electron Scattering and the XENON1T Excess
• Les Houches Lectures on Indirect Detection of Dark Matter
• The ups and downs of inelastic dark matter: Electron recoils from terrestrial upscattering
• Dark Matter Direct Detection of Classical WIMPs
• Boosted Self-Interacting Dark Matter and XENON1T Excess
• Xenon-1T excess as a possible signal of a sub-GeV hidden sector dark matter

Cited by in corpus (6)

• Probing Dark Matter Electromagnetic Properties in Direct Detection Experiments
• Neutrinos from the Sun can discover dark matter-electron scattering
• Cosmic-Ray Cooling in Active Galactic Nuclei as a New Probe of Inelastic Dark Matter
• Low-mass constraints on WIMP effective models of inelastic scattering using the Migdal effect
• Correlating neutrino magnetic moment and scalar triplet dark matter to enlighten XENONnT bounds in a Type-II model
• Comparison of the Migdal transition probabilities in electron-atom inelastic cross sections