Self-interacting asymmetric dark matter coupled to a light massive dark photon

Abstract

Dark matter (DM) with sizeable self-interactions mediated by a light species offers a compelling explanation of the observed galactic substructure; furthermore, the direct coupling between DM and a light particle contributes to the DM annihilation in the early universe. If the DM abundance is due to a dark particle-antiparticle asymmetry, the DM annihilation cross-section can be arbitrarily large, and the coupling of DM to the light species can be significant. We consider the case of asymmetric DM interacting via a light (but not necessarily massless) Abelian gauge vector boson, a dark photon. In the massless dark photon limit, gauge invariance mandates that DM be multicomponent, consisting of positive and negative dark ions of different species which partially bind in neutral dark atoms. We argue that a similar conclusion holds for light dark photons; in particular, we establish that the multi-component and atomic character of DM persists in much of the parameter space where the dark photon is sufficiently light to mediate sizeable DM self-interactions. We discuss the cosmological sequence of events in this scenario, including the dark asymmetry generation, the freeze-out of annihilations, the dark recombination and the phase transition which gives mass to the dark photon. We estimate the effect of self-interactions in DM haloes, taking into account this cosmological history. We place constraints based on the observed ellipticity of large haloes, and identify the regimes where DM self-scattering can affect the dynamics of smaller haloes, bringing theory in better agreement with observations. Moreover, we estimate the cosmological abundance of dark photons in various regimes, and derive pertinent bounds.

v3: published version

References in corpus (15)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Secluded U(1) below the weak scale
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• Bosonic super-WIMPs as keV-scale dark matter
• Probing a Secluded U(1) at B-factories
• Self-Interacting Dark Matter from a Non-Abelian Hidden Sector
• Mirror dark matter: Cosmology, galaxy structure and direct detection
• Resonant Dark Forces and Small Scale Structure
• A robust upper limit on N_eff from BBN, circa 2011
• Composite dark matter from a model with composite Higgs boson
• Strong Interactive Massive Particles from a Strong Coupled Theory
• Probing Hidden Sector Photons through the Higgs Window
• A comprehensive analysis of the dark matter direct detection experiments in the mirror dark matter framework
• Decaying Dark Atom constituents and cosmic positron excess

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