Fine Structure of Dark Matter Halos and its Effect on Terrestrial Detection Experiments

Abstract

Terrestrial dark matter detection experiments probe the velocity-space distribution of dark matter particles in the vicinity of the Earth. We present a novel method, to be used in conjunction with standard cosmological simulations of hierarchical clustering, that allows one to extract a truly local velocity-space distribution in exquisite detail. Preliminary results suggest a new picture for this distribution which is decidedly non-Maxwellian but instead is characterized by randomly positioned peaks in velocity space. We discuss the implications of these results for both WIMP and axion detection experiments.

arXiv comment5 pages, 3 figures

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• Directional statistics for WIMP direct detection
• Diurnal and Annual Modulation of Cold Dark Matter Signals
• The local dark matter phase-space density and impact on WIMP direct detection
• The Caustic Ring Model of the Milky Way Halo
• Optimizing WIMP directional detectors
• Effect of realistic astrophysical inputs on the phase and shape of the WIMP annual modulation signal
• The Graininess of Dark Matter Haloes
• Determining the WIMP mass using direct detection experiments
• Peaks above the Maxwellian Sea: A New Approach to Finding Substructure in N-Body Haloes
• Results of a Search for Cold Flows of Dark Matter Axions
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• Determining the WIMP mass from a single direct detection experiment, a more detailed study
• Robustness of Discrete Flows and Caustics in Cold Dark Matter Cosmology
• Informing dark matter direct detection limits with the ARTEMIS simulations
• A further look at particle annihilation in dark matter caustics
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• Modelling ultra-fine structure in dark matter halos
• Ultra-fine dark matter structure in the Solar neighbourhood
• Dark Matter Caustics in Galaxy Clusters
• Non-Virialized Axion Search Sensitive to Doppler Effects in the Milky Way Halo
• Determination of Dark Matter Properties at High-Energy Colliders