Changes in Dark Matter Properties After Freeze-Out

Abstract

The properties of the dark matter that determine its thermal relic abundance can be very different from the dark matter properties today. We investigate this possibility by coupling a dark matter sector to a scalar that undergoes a phase transition after the dark matter freezes out. If the value of Omega_DM h^2 calculated from parameters measured at colliders and by direct and indirect detection experiments does not match the astrophysically observed value, a novel cosmology of this type could provide the explanation. This mechanism also has the potential to account for the "boost factor" required to explain the PAMELA data.

5 pages; v2: Fixed minor typo, added short discussion of application to PAMELA and appropriate references, results unchanged

References in corpus (12)

• Search for the Standard Model Higgs Boson at LEP
• Wino Cold Dark Matter from Anomaly-Mediated SUSY Breaking
• Astrophysical Axion Bounds
• Thermal Inflation and the Moduli Problem
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• Dynamics of Non-renormalizable Electroweak Symmetry Breaking
• On the Cosmological Domain Wall Problem for the Minimally Extended Supersymmetric Standard Model
• The Minimal Model for Dark Matter and Unification
• Search for Light CP-odd Higgs in Radiative Decays of Upsilon(1S)
• Role of h --> eta eta in Intermediate-Mass Higgs Boson Searches at the Large Hadron Collider
• Higgs Signal for h to aa at Hadron Colliders
• Relic abundance of mass-varying cold dark matter particles

Cited by in corpus (45)

• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Thermal Dark Matter From A Highly Decoupled Sector
• PeV-Scale Dark Matter as a Thermal Relic of a Decoupled Sector
• Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
• Filtered Dark Matter at a First Order Phase Transition
• Fermi-ball dark matter from a first-order phase transition
• Maximizing Direct Detection with Highly Interactive Particle Relic Dark Matter
• Sterile Neutrinos with Secret Interactions -- Cosmological Discord?
• Dynamic Freeze-In: Impact of Thermal Masses and Cosmological Phase Transitions on Dark Matter Production
• Inflatable Dark Matter
• Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
• The Vev Flip-Flop: Dark Matter Decay between Weak Scale Phase Transitions
• Reconstructing Non-standard Cosmologies with Dark Matter
• Here be Dragons: The Unexplored Continents of the CMSSM
• Strongly First Order Phase Transitions Near an Enhanced Discrete Symmetry Point
• WIMPs during Reheating
• The Dark Side of the Electroweak Phase Transition
• Invisible decays of axion-like particles: constraints and prospects
• Filtered pseudo-scalar dark matter and gravitational waves from first order phase transition
• On the Correlation Between the Spin-Independent and Spin-Dependent Direct Detection of Dark Matter
• Cosmological Constant, Dark Matter, and Electroweak Phase Transition
• WIMPs with GUTs: Dark Matter Coannihilation with a Lighter Species
• Light Dark Sectors through the Fermion Portal
• Dark Matter Assimilation into the Baryon Asymmetry
• Electroweak phase transition and gravitational waves in a two-component dark matter model
• Cosmology and time dependent parameters induced by misaligned light scalar
• Secluded Dark Matter Coupled to a Hidden CFT
• Gravitational waves from neutrino mass and dark matter genesis
• Probing the Cosmological Constant and Phase Transitions with Dark Matter
• Cosmic Ray Positrons from Annihilations into a New, Heavy Lepton
• Constraints on new physics around the MeV scale with cosmological observations
• Neutrinophilic Dark Matter in the epoch of IceCube and Fermi-LAT
• Phase Transitions and Baryogenesis From Decays
• Dilution of dark matter relic density in singlet extension models
• Dark matter transient annihilations in the early Universe
• Modifying dark matter indirect detection signals by thermal effects at freeze-out
• Dark Matter with Time-Varying Leptophilic Couplings
• Everything You Always Wanted to Know About Dark Matter Elastic Scattering Through Higgs Loops But Were Afraid to Ask
• Mass-varying Dark Matter from a Phase Transition
• Mechanism for dark matter depopulation
• Non-thermal production of heavy vector dark matter from relativistic bubble walls
• Diffuse X-Ray and Gamma-Ray Limits on Boson Stars that Interact with Nuclei
• Dark Matter with Density-Dependent Interactions
• Hidden Photon and Axion Dark Matter from Symmetry Breaking
• Leptogenesis with dynamical couplings