Annihilating Asymmetric Dark Matter

Abstract

The relic abundance of particle and antiparticle dark matter (DM) need not be vastly different in thermal asymmetric dark matter (ADM) models. By considering the effect of a primordial asymmetry on the thermal Boltzmann evolution of coupled DM and anti-DM, we derive the requisite annihilation cross section. This is used in conjunction with CMB and Fermi-LAT gamma-ray data to impose a limit on the number density of anti-DM particles surviving thermal freeze-out. When the extended gamma-ray emission from the Galactic Center is reanalyzed in a thermal ADM framework, we find that annihilation into $\tau$ leptons prefer anti-DM number densities 1-4$\%$ that of DM while the $b$-quark channel prefers 50-100$\%$.

7 pages, 5 figures

References in corpus (59)

• Planck 2013 results. XVI. Cosmological parameters
• Particle Dark Matter: Evidence, Candidates and Constraints
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• Asymmetric Dark Matter: Theories, Signatures, and Constraints
• On The Origin Of The Gamma Rays From The Galactic Center
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Review of asymmetric dark matter
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• Quark mass thresholds in QCD thermodynamics
• Exclusion of canonical WIMPs by the joint analysis of Milky Way dwarfs with Fermi
• Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
• A Renormalizable Model for the Galactic Center Gamma Ray Excess from Dark Matter Annihilation
• The flattening of the concentration-mass relation towards low halo masses and its implications for the annihilation signal boost
• The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster
• Asymmetric WIMP dark matter
• Searching for Dark Matter in the CMB: A Compact Parameterization of Energy Injection from New Physics
• Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
• Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement
• Updated CMB constraints on Dark Matter annihilation cross-sections
• On Symmetric and Asymmetric Light Dark Matter
• Pulsars Cannot Account for the Inner Galaxy's GeV Excess
• Extended gamma-ray emission from Coy Dark Matter
• Hidden On-Shell Mediators for the Galactic Center Gamma-Ray Excess
• Dark Nuclei I: Cosmology and Indirect Detection
• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• WMAP7 and future CMB constraints on annihilating dark matter: implications for GeV-scale WIMPs
• The windows for kinetically mixed Z'-mediated dark matter and the galactic center gamma ray excess
• The Contribution of Cosmic Rays Interacting With Molecular Clouds to the Galactic Center Gamma-Ray Excess
• The Effective Hooperon
• A weighty interpretation of the Galactic Centre excess
• Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess
• NMSSM Interpretation of the Galactic Center Excess
• The Galactic Center Excess from the Bottom Up
• Fitting the Fermi-LAT GeV excess: On the importance of including the propagation of electrons from dark matter
• Constraining Extended Gamma-ray Emission from Galaxy Clusters
• Evidence for extended gamma-ray emission from galaxy clusters
• Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess
• Constraints on the annihilation cross section of dark matter particles from anisotropies in the diffuse gamma-ray background measured with Fermi-LAT
• In Pursuit of the Least Luminous Galaxies
• Can Astrophysical Gamma Ray Sources Mimic Dark Matter Annihilation in Galactic Satellites?
• Cross-Correlation of Cosmic Shear and Extragalactic Gamma-ray Background: Constraints on the Dark Matter Annihilation Cross-Section
• Mixed dark matter from technicolor
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• Resolving Small-Scale Dark Matter Structures Using Multi-Source Indirect Detection
• Conservative Constraints on Dark Matter from the Fermi-LAT Isotropic Diffuse Gamma-Ray Background Spectrum
• CMB bounds on dark matter annihilation: Nucleon energy-losses after recombination
• Local Group dSph radio survey with ATCA (III): Constraints on Particle Dark Matter
• Bounds on dark matter interpretation of Fermi-LAT GeV excess
• Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
• Annihilation Signals from Asymmetric Dark Matter

Cited by in corpus (36)

• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• WIMPs at the Galactic Center
• Asymmetric thermal-relic dark matter: Sommerfeld-enhanced freeze-out, annihilation signals and unitarity bounds
• Asymmetric dark matter: residual annihilations and self-interactions
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Constraining Photon Portal Dark Matter with Texono and Coherent Data
• On the Direct Detection of Dark Matter Annihilation
• Monochromatic dark neutrinos and boosted dark matter in noble liquid direct detection
• Fits to the Fermi-LAT GeV excess with RH sneutrino dark matter: implications for direct and indirect dark matter searches and the LHC
• Signals from dark atom formation in halos
• Multimediator models for the galactic center gamma ray excess
• Composite Asymmetric Dark Matter with a Dark Photon Portal
• The $\text{Fermi}$-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• Galactic Center Gamma-Ray Excess through a Dark Shower
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• CMB Constraints On The Thermal WIMP Mass And Annihilation Cross Section
• Asymptotically Safe Dark Matter
• Resonant or asymmetric: The status of sub-GeV dark matter
• Confronting the Moduli-Induced LSP Problem
• Radiative Neutrino Mass with $Z_3$ Dark matter: From Relic Density to LHC Signatures
• Point Sources from Dissipative Dark Matter
• Confronting Galactic center and dwarf spheroidal gamma-ray observations with cascade annihilation models
• Detecting Asymmetric Dark Matter in the Sun with Neutrinos
• Indirect searches for dark matter bound state formation and level transitions
• Dark Higgs Channel for FERMI GeV $\gamma$-ray Excess
• Wavelet-Based Techniques for the Gamma-Ray Sky
• Tau Portal Dark Matter models at the LHC
• Dark Matter, Shared Asymmetries, and Galactic Gamma Ray Signals
• Asymmetric dark matter with a spontaneously broken $U(1{)}^{\prime }$: self-interaction and gravitational waves
• Minimal Asymmetric Dark Matter
• Asymmetric Dark Matter Models and the LHC Diphoton Excess
• Nucleon-decay-like signatures of Hylogenesis
• Asymmetric dark matter and effective number of neutrinos
• Asymmetric dark matter from semi-annihilation: unitarity constraints and long-lived final states