Sterile neutrino dark matter via coinciding resonances

Abstract

It has been proposed that two resonances could coincide in the early universe at temperatures $T\sim \mathrm{0.2...0.5}$ GeV: one between two nearly degenerate GeV-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three sterile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.

14 pages. v2: clarification added

References in corpus (8)

• The Sphaleron Rate in the Minimal Standard Model
• The nuMSM, leptonic asymmetries, and properties of singlet fermions
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• The minimal 3+2 neutrino model versus oscillation anomalies
• $N_{\mathrm{eff}}$ in low-scale seesaw models versus the lightest neutrino mass
• Sterile neutrino dark matter via GeV-scale leptogenesis?
• Kinetic equations for sterile neutrinos from thermal fluctuations
• A thermal neutrino interaction rate at NLO

Cited by in corpus (30)

• Feebly-Interacting Particles:FIPs 2020 Workshop Report
• The Present and Future Status of Heavy Neutral Leptons
• Uniting low-scale leptogeneses
• Searches for Long-Lived Particles at the Future FCC-ee
• Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model
• Einstein-Cartan Portal to Dark Matter
• An allowed window for heavy neutral leptons below the kaon mass
• Search for heavy neutral leptons in decays of $W$ bosons using a dilepton displaced vertex in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• On the origin of matter in the Universe
• Gauge hierarchy from electroweak vacuum metastability
• Coupling Metric-Affine Gravity to the Standard Model and Dark Matter Fermions
• Constraints on primordial lepton asymmetries with full neutrino transport
• MeV-scale Seesaw and Leptogenesis
• HNL mass degeneracy: implications for low-scale seesaws, LNV at colliders and leptogenesis
• New Physics Search at the CEPC: a General Perspective
• Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Freeze-in and freeze-out generation of lepton asymmetries after baryogenesis in the $\nu$MSM
• Freeze-In Dark Matter within the Seesaw mechanism
• On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos
• Inverse Seesaw, dark matter and the Hubble tension
• Prospects for Heavy Neutral Lepton Searches at Short and Medium Baseline Reactor Experiments
• Minimal Leptogenesis in Brane-inspired Cosmology
• Search for a heavy neutral lepton that mixes predominantly with the tau neutrino
• Probing Solar Heavy Neutrinos with Heliospheric Electrons
• Testable dark matter solution within the seesaw mechanism
• New Particles at the Z-Pole: Tera-Z factories as discovery and precision machines
• Reconciling resonant leptogenesis and baryogenesis via neutrino oscillations
• Sterile neutrino rates for general $M$, $T$, $\mu$, $k$: review of a theoretical framework
• Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector
• Completing RHINO