Lyman-$\alpha$ constraints on freeze-in and superWIMPs

Abstract

Dark matter (DM) from freeze-in or superWIMP production is well known to imprint non-cold DM signatures on cosmological observables. We derive constraints from Lyman-$\alpha$ forest observations for both cases, basing ourselves on a reinterpretation of the existing Lyman-$\alpha$ limits on thermal warm DM. We exclude DM masses below 15 keV for freeze-in, in good agreement with previous literature, and provide a generic lower mass bound for superWIMPs that depends on the mother particle decay width. Special emphasis is placed on the mixed scenario, where contributions from both freeze-in and superWIMP are similarly important. In this case, the imprint on cosmological observables can deviate significantly from thermal warm DM. Furthermore, we provide a modified version of the Boltzmann code CLASS, analytic expressions for the DM distributions, and fits to the DM transfer functions that account for both mechanisms of production. Moreover, we also derive generic constraints from $\Delta N_{\mathrm{eff}}$ measurements and show that they cannot compete with those arising from Lyman-$\alpha$ observations. For illustration, we apply the above generic limits to a coloured $t$-channel mediator DM model, in which case contributions from both freeze-in through scatterings and decays, as well as superWIMP production can be important. We map out the entire cosmologically viable parameter space, cornered by bounds from Lyman-$\alpha$ observations, the LHC, and Big Bang Nucleosynthesis.

31 pages + references, 5 figures, v2: Legend of Fig. 2 corrected, Appendix A expanded, references added

References in corpus (28)

• Cosmology and Astrophysics of Minimal Dark Matter
• Big Bang Nucleosynthesis Constraints on Hadronically and Electromagnetically Decaying Relic Neutral Particles
• Review of LHC Dark Matter Searches
• Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
• Making dark matter out of light: freeze-in from plasma effects
• Constraints from Ly-$\alpha$ forests on non-thermal dark matter including resonantly-produced sterile neutrinos
• NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation
• Search for heavy charged long-lived particles in the ATLAS detector in 36.1 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• Cold keV dark matter from decays and scatterings
• keV Sterile Neutrino Dark Matter from Singlet Scalar Decays: Basic Concepts and Subtle Features
• Bounds on long-lived charged massive particles from Big Bang nucleosynthesis
• Anatomy of Coannihilation with a Scalar Top Partner
• Hidden gauginos of an unbroken U(1): Cosmological constraints and phenomenological prospects
• Lower Mass Bounds on FIMP Dark Matter Produced via Freeze-In
• The cosmology of sub-MeV dark matter freeze-in
• Effects of QCD bound states on dark matter relic abundance
• The full Boltzmann hierarchy for dark matter-massive neutrino interactions
• Effect of Long-lived Strongly Interacting Relic Particles on Big Bang Nucleosynthesis
• Freeze-in produced dark matter in the ultra-relativistic regime
• Displaced new physics at colliders and the early universe before its first second
• The Cosmological Evolution of Self-interacting Dark Matter
• Dark Matter Abundance from Sequential Freeze-in Mechanism
• MeV Right-handed Neutrinos and Dark Matter
• Simple estimate of BBN sensitivity to light freeze-in dark matter
• ACROPOLIS: A generiC fRamework fOr Photodisintegration Of LIght elementS
• LHC prospects for minimal decaying Dark Matter
• Efficient numerical integration of thermal interaction rates

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