WIMPless Dark Matter in Anomaly-Mediated Supersymmetry Breaking with Hidden QED

Abstract

In anomaly-mediated supersymmetry breaking, superpartners in a hidden sector have masses that are proportional to couplings squared, and so naturally freeze out with the desired dark matter relic density for a large range of masses. We present an extremely simple realization of this possibility, with WIMPless dark matter arising from a hidden sector that is supersymmetric QED with N_F flavors. Dark matter is multi-component, composed of hidden leptons and sleptons with masses anywhere from 10 GeV to 10 TeV, and hidden photons provide the thermal bath. The dark matter self-interacts through hidden sector Coulomb scatterings that are potentially observable. In addition, the hidden photon contribution to the number of relativistic degrees of freedom is in the range ΔN_eff ~ 0 - 2, and, if the hidden and visible sectors were initially in thermal contact, the model predicts ΔN_eff ~ 0.2 - 0.4. Data already taken by Planck may provide evidence of such deviations.

17 pages

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Cited by in corpus (12)

• Self-Interacting Dark Matter from a Non-Abelian Hidden Sector
• On Symmetric and Asymmetric Light Dark Matter
• SIMPle Dark Matter: Self-Interactions and keV Lines
• Increasing Neff with particles in thermal equilibrium with neutrinos
• Dark radiation from particle decay: cosmological constraints and opportunities
• Dark Radiation from Particle Decays during Big Bang Nucleosynthesis
• Neutrino Cosmology after WMAP and LHC7
• Origin of Delta N_eff as a Result of an Interaction between Dark Radiation and Dark Matter
• Interpreting a 1 fb^-1 ATLAS Search in the Minimal Anomaly Mediated Supersymmetry Breaking Model
• Confronting the Moduli-Induced LSP Problem
• Dark Matter Antibaryons from a Supersymmetric Hidden Sector
• WIMPless Dark Matter from an AMSB Hidden Sector with No New Mass Parameters