Resonance enhancement of dark matter interactions: the case for early kinetic decoupling and velocity dependent resonance width

Abstract

Motivated by the possibility of enhancing dark matter (DM) self-interaction cross-section ${\sigma }_{\mathrm{self}}$, we have revisited the issue of DM annihilation through a Breit-Wigner resonance. In this case thermally averaged annihilation cross-section has strong temperature dependence, whereas elastic scattering of DM on the thermal bath particles is suppressed. This leads to the early kinetic decoupling of DM and an interesting interplay in the evolution of DM density and temperature that can be described by a set of coupled Boltzmann equations. The standard Breit-Wigner parametrization of a resonance propagator is also corrected by including momentum dependence of the resonance width. It has been shown that this effects may change predictions of DM relic density by more than order of magnitude in some regions of the parameter space. Model independent discussion is illustrated within a theory of Abelian vector dark matter. The model assumes extra $U(1)$ symmetry group factor and an additional complex Higgs field needed to generate a mass for the dark vector boson, which provides an extra neutral Higgs boson $h_2$. We discuss the resonance amplification of ${\sigma }_{\mathrm{self}}$. It turns out that if DM abundance is properly reproduced, the Fermi-LAT data favor heavy DM and constraint the enhancement of ${\sigma }_{\mathrm{self}}$ to the range, which cannot provide a solution to the small-scale structure problems.}

17 pages, 5 figures, v2: minor changes in text, BBN and CMB constraints added

References in corpus (11)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• Too Big to Fail in the Local Group
• Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
• PAMELA Positron Excess as a Signal from the Hidden Sector
• Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance
• Scattering, Damping, and Acoustic Oscillations: Simulating the Structure of Dark Matter Halos with Relativistic Force Carriers
• VDM: A model for Vector Dark Matter
• Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models
• The Future of the Local Large Scale Structure: the roles of Dark Matter and Dark Energy

Cited by in corpus (19)

• DRAKE: Dark matter Relic Abundance beyond Kinetic Equilibrium
• Improved bounds on ${\mathbb{Z}}_3$ singlet dark matter
• Scale Invariant FIMP Miracle
• Maximally self-interacting dark matter: models and predictions
• Feebly coupled vector boson dark matter in effective theory
• Non-minimally Coupled Vector Boson Dark Matter
• A Global Analysis of Resonance-enhanced Light Scalar Dark Matter
• Impact of dark matter self-scattering on its relic abundance
• Relic density of dark matter in the inert doublet model beyond leading order for the low mass region: 1. Renormalisation and constraints
• Coscattering in next-to-minimal dark matter and split supersymmetry
• Sommerfeld enhancement of resonant dark matter annihilation
• Inflation and DM phenomenology in a scotogenic model extended with a real singlet scalar
• Electroweak Symmetry Breaking and WIMP-FIMP Dark Matter
• Relic density and temperature evolution of a light dark sector
• Phase Transitions and Gravitational Waves in a Model of ${\mathbb{Z}}_3$ Scalar Dark Matter
• The hMSSM with a Light Gaugino/Higgsino Sector: Implications for Collider and Astroparticle Physics
• GeV-scale dark matter with $p$-wave Breit-Wigner enhanced annihilation
• Unitarity, real-intermediate states, and fixed-order approach to resonant dark matter annihilation
• Boltzmann Equation Solver for Thermalization