Late Kinetic Decoupling of Light Magnetic Dipole Dark Matter

Abstract

We study the kinetic decoupling of light (lesssim 10 GeV) magnetic dipole dark matter (DM). We find that present bounds from collider, direct DM searches, and structure formation allow magnetic dipole DM to remain in thermal equilibrium with the early universe plasma until as late as the electron-positron annihilation epoch. This late kinetic decoupling leads to a minimal mass for the earliest dark protohalos of thousands of solar masses, in contrast to the conventional weak scale DM scenario where they are of order 10^{-6} solar masses.

14 pages, 2 figures

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Cited by in corpus (15)

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• Collider Detection of Dark Matter Electromagnetic Anapole Moments
• Primordial black hole dark matter in the presence of p-wave WIMP annihilation
• Boosting small-scale structure via primordial black holes and implications for sub-GeV dark matter annihilation
• Cosmological constraints on the velocity-dependent baryon-dark matter coupling
• CMB and 21cm bounds on early structure formation boosted by primordial black hole entropy fluctuations
• Radio bounds on the mixed dark matter scenarios of primordial black holes and WIMPs
• Cosmological singlet diagnostics of neutrinophilic dark matter
• Kinetic recoupling of dark matter
• Diffusion-limited Relic Particle Production
• Testing Dark Matter with the Anomalous Magnetic Moment in Quantum Electrodynamics Model
• Direct Detection and Cosmological Constraints of Dark Matter with Dark Dipoles