Ultra High Energy Cosmic Rays & Super-heavy Dark Matter

Abstract

We reanalyse the prospects for upcoming Ultra-High Energy Cosmic Ray experiments in connection with the phenomenology of Super-heavy Dark Matter. We identify a set of observables well suited to reveal a possible anisotropy in the High Energy Cosmic Ray flux induced by the decays of these particles, and quantify their performance via Monte Carlo simulations that mimic the outcome of near-future and next-generation experiments. The spherical and circular dipoles are able to tell isotropic and anisotropic fluxes apart at a confidence level as large as $4\sigma$ or $5\sigma$, depending on the Dark Matter profile. The forward-to-backward flux ratio yields a comparable result for relatively large opening angles of about 40~deg, but it is less performing once a very large number of events is considered. We also find that an actual experiment employing these observables and collecting 300~events at 60~EeV would have a $50\%$ chance of excluding isotropy against Super-heavy Dark Matter at a significance of at least $3\sigma$

15 pages + appendix + 10 figures

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Cited by in corpus (11)

• Heavy decaying dark matter and IceCube high energy neutrinos
• Super-Heavy Dark Matter - Towards Predictive Scenarios from Inflation
• Testing Super-Heavy Dark Matter from Primordial Black Holes with Gravitational Waves
• PBH-infused seesaw origin of matter and unique gravitational waves
• Modeling the black holes surrounded by a dark matter halo in the galactic center of M87
• New mechanism of producing superheavy Dark Matter
• Computation of Gravitational Particle Production Using Adiabatic Invariants
• Ultra high energy cosmic rays from super-heavy dark matter in the context of large exposure observatories
• Search for heavy dark matter from dwarf spheroidal galaxies: leveraging cascades and subhalo models
• Dark Matter and Baryon Asymmetry from the very Dawn of Universe
• Bounds from multi-messenger astronomy on the Super Heavy Dark Matter