Making dark matter out of light: freeze-in from plasma effects

Abstract

Dark matter (DM) could couple to particles in the Standard Model (SM) through a light vector mediator. In the limit of small coupling, this portal could be responsible for producing the observed DM abundance through a mechanism known as freeze-in. Furthermore, the requisite DM-SM couplings provide a concrete benchmark for direct and indirect searches for DM. In this paper, we present updated calculations of the relic abundance for DM produced by freeze-in through a light vector mediator. We identify an additional production channel: the decay of photons that acquire an in-medium plasma mass. These plasmon decays are a dominant channel for DM production for sub-MeV DM masses, and including this channel leads to a significant reduction in the predicted signal strength for DM searches. Accounting for production from both plasmon decays and annihilations of SM fermions, the DM acquires a highly non-thermal phase space distribution which impacts the cosmology at later times; these cosmological effects will be explored in a companion paper.

23+8 pages, 8+1 figures

References in corpus (21)

• Secluded WIMP Dark Matter
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• The WIMPless Miracle: Dark Matter Particles without Weak-scale Masses or Weak Interactions
• Light Dark Matter: Models and Constraints
• Stellar cooling bounds on new light particles: plasma mixing effects
• Turning off the Lights: How Dark is Dark Matter?
• SENSEI: Direct-Detection Constraints on Sub-GeV Dark Matter from a Shallow Underground Run Using a Prototype Skipper-CCD
• Detection of sub-MeV Dark Matter with Three-Dimensional Dirac Materials
• US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
• Stellar Recipes for Axion Hunters
• Revisiting the axion bounds from the Galactic white dwarf luminosity function
• Review of short-range gravity experiments in the LHC era
• BBN And The CMB Constrain Neutrino Coupled Light WIMPs
• Light Dark Matter in Superfluid Helium: Detection with Multi-excitation Production
• Reopening the window on charged dark matter
• Right-Handed Sneutrino as Cold Dark Matter of the Universe
• Right-handed Sneutrinos as Nonthermal Dark Matter
• Constraints on millicharged neutrinos via analysis of data from atomic ionizations with germanium detectors at sub-keV sensitivities
• Vector SIMP dark matter
• Dark Cosmic Rays
• KeV Scale Frozen-in Self-Interacting Fermionic Dark Matter

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• Lyman-$\alpha$ constraints on freeze-in and superWIMPs
• Maximizing Direct Detection with Highly Interactive Particle Relic Dark Matter
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• Les Houches Lectures on Indirect Detection of Dark Matter
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• The Milky Way, Coming into Focus: Precision Astrometry Probes its Evolution, and its Dark Matter
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• FIMP dark matter mediated by massive gauge boson around the phase transition period and the gravitational waves production
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