Dark Radiation or Warm Dark Matter from long lived particle decays in the light of Planck

Abstract

Although Planck data supports the standard ΛCDM model, it still allows for the presence of Dark Radiation corresponding up to about half an extra standard neutrino species. We propose a scenario for obtaining a fractional "effective neutrino species" from a thermally produced particle which decays into a much lighter stable relic plus standard fermions. At lifetimes much longer than 1 sec, both the relic particles and the non-thermal neutrino component contribute to Dark Radiation. By increasing the stable-to-unstable particle mass ratio, the relic particle no longer acts as Dark Radiation but instead becomes a candidate for Warm Dark Matter with mass O(1keV - 100GeV). In both cases it is possible to address the lithium problem.

18 pages, 2 figures; v3 matches version to be published in PLB

References in corpus (15)

• Planck 2013 results. XVI. Cosmological parameters
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Cosmology seeking friendship with sterile neutrinos
• New Light Species and the CMB
• The strongest bounds on active-sterile neutrino mixing after Planck data
• Dark Radiation Emerging After Big Bang Nucleosynthesis?
• Metastable GeV-scale particles as a solution to the cosmological lithium problem
• Solving the cosmic lithium problems with primordial late-decaying particles
• A theory of extra radiation in the Universe
• Probing Low Energy Neutrino Backgrounds with Neutrino Capture on Beta Decaying Nuclei
• Axions and saxions from the primordial supersymmetric plasma and extra radiation signatures
• Dark radiation and small-scale structure problems with decaying particles
• Bino Dark Matter and Big Bang Nucleosynthesis in the Constrained E6SSM with Massless Inert Singlinos
• Dark radiation and dark matter in supersymmetric axion models with high reheating temperature

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