A Model For Late Dark Matter Decay

Abstract

The standard cold dark matter cosmological model, while successful in explaining the observed large scale structure of the Universe, tends to overpredict structure on small scales. It has been proposed this problem may be alleviated in a class of late-decaying dark matter models, in which the parent dark matter particle decays to an almost degenerate daughter, plus a relativistic final state. We construct explicit particle physics models that realize this goal while obeying observational constraints. To achieve this, we introduce a pair of fermionic dark matter candidates and a new scalar field, which obey either a Z4 or a U(1) symmetry. Through the spontaneous breaking of these symmetries, and coupling of the new fields to standard model particles, we demonstrate that the desired decay process may be obtained. We also discuss the dark matter production processes in these models.

10 pages, 8 figures; updated to match published version, minor changes to text and figures

References in corpus (46)

• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Where are the missing galactic satellites?
• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Cold collapse and the core catastrophe
• The Anatomy of Electro-Weak Symmetry Breaking. II: The Higgs bosons in the Minimal Supersymmetric Model
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Inelastic Dark Matter
• The Cold Dark Matter Density Perturbation
• First Results from the XENON10 Dark Matter Experiment at the Gran Sasso National Laboratory
• The cored distribution of dark matter in spiral galaxies
• The Observed properties of Dark Matter on small spatial scales
• Dark matter substructure and gamma-ray annihilation in the Milky Way halo
• A Search for WIMPs with the First Five-Tower Data from CDMS
• Resummation in a Hot Scalar Field Theory
• The Universal Rotation Curve of Spiral Galaxies. II The Dark Matter Distribution out to the Virial Radius
• Halo Shape and Relic Density Exclusions of Sommerfeld-Enhanced Dark Matter Explanations of Cosmic Ray Excesses
• Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
• The all-sky distribution of 511 keV electron-positron annihilation emission
• The Void Phenomenon
• Sommerfeld Enhancements for Thermal Relic Dark Matter
• The Formation of a Realistic Disk Galaxy in Lambda Dominated Cosmologies
• Formation of Disk Galaxies: Warm Dark Matter and the Angular Momentum problem
• Sommerfeld factor for arbitrary partial wave processes
• Substructure depletion in the Milky Way halo by the disk
• Multi-Component Dark Matter
• Inelastic Dark Matter in Light of DAMA/LIBRA
• Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
• Galaxy number counts - V. Ultra-deep counts: The Herschel and Hubble Deep Fields
• The Sommerfeld enhancement for dark matter with an excited state
• Dark Matter from Early Decays
• SuperWIMP Solutions to Small Scale Structure Problems
• Multicomponent Dark Matter in Supersymmetric Hidden Sector Extensions
• Can we discover dual-component thermal WIMP dark matter?
• Circumscribing Late Dark Matter Decays Model Independently
• Impact of Dark Matter Microhalos on Signatures for Direct and Indirect Detection
• Dark-Matter Decays and Self-Gravitating Halos
• Unstable Cold Dark Matter and the Cuspy Halo Problem in Dwarf Galaxies
• Dark-matter decays and Milky Way satellite galaxies
• Observed Properties of Dark Matter: dynamical studies of dSph galaxies
• Lifetime Constraints for Late Dark Matter Decay
• CMB and 21-cm Signals for Dark Matter with a Long-Lived Excited State
• Decaying Dark Matter and the Deficit of Dwarf Haloes
• Weak Gravitational Lensing as a Method to Constrain Unstable Dark Matter

Cited by in corpus (16)

• Review of asymmetric dark matter
• Searching for Dark Matter in the CMB: A Compact Parameterization of Energy Injection from New Physics
• Energy Injection And Absorption In The Cosmic Dark Ages
• Self-Scattering for Dark Matter with an Excited State
• Consistent Scenarios for Cosmic-Ray Excesses from Sommerfeld-Enhanced Dark Matter Annihilation
• A New Direction in Dark-Matter Complementarity: Dark-Matter Decay as a Complementary Probe of Multi-Component Dark Sectors
• Self-interacting inelastic dark matter: A viable solution to the small scale structure problems
• Cosmological bounds on dark matter-photon coupling
• Effects of Unstable Dark Matter on Large-Scale Structure and Constraints from Future Surveys
• Evolution of perturbations and cosmological constraints in decaying dark matter models with arbitrary decay mass products
• Formulation and constraints on decaying dark matter with finite mass daughter particles
• Superhorizon entanglement from inflationary particle production
• Fully relativistic treatment of decaying cold dark matter in $N$-body simulations
• Constraints on Dark Matter-Photon Coupling in the Presence of Time-Varying Dark Energy
• Baryonic and Leptonic GeV Dark Matter
• Optimizing the Evolution of Perturbations in the $\Lambda$CDM Universe