Neutrinos from Earth-Bound Dark Matter Annihilation

Abstract

A sub-component of dark matter with a short collision length compared to a planetary size leads to efficient accumulation of dark matter in astrophysical bodies. We analyze possible neutrino signals from the annihilation of such dark matter and conclude that in the optically thick regime for dark matter capture, the Earth provides the largest neutrino flux. Using the results of the existing searches, we consider two scenarios for the neutrino flux, from stopped mesons and prompt higher-energy neutrinos. In both cases we exclude some previously unexplored parts of the parameter space (dark matter mass, its abundance, and the scattering cross section on nuclei) by recasting the existing neutrino searches.

arXiv commentv2: 15 pages, 5 figures. Minor clarifications added, conclusion unchanged. Published in JCAP

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• Continuous Gravitational Waves: A New Window to Look for Heavy Non-annihilating Dark Matter
• Optimal Celestial Bodies for Dark Matter Detection
• On the cosmology and terrestrial signals of sexaquark dark matter
• Super-Kamiokande Strongly Constrains Leptophilic Dark Matter Capture in the Sun
• Searching for MeV-mass neutrinophilic Dark Matter with Large Scale Dark Matter Detectors