Constraining superheavy dark matter model of UHECR with SUGAR data
arXiv:astro-ph/0306413 · doi:10.1016/j.astropartphys.2004.03.004
Abstract
Models which associate the origin of the ultra-high energy cosmic rays (UHECR) with decays of relic superheavy particles predict the anisotropy of UHECR flux toward the Galactic center. We use the existing SUGAR data, which covered the Galactic center best so far, to look for such a signal and limit the fraction of UHECR produced by this mechanism. The absence of anisotropy toward the Galactic center in the SUGAR data implies at 95% confidence level that the fraction of SHDM-related cosmic rays should be less than 20% at eV and less than 50% at eV.
arXiv comment10 pages, 12 figures
References in corpus (13)
- Extension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff
- Production of massive particles during reheating
- Small-scale anisotropy of cosmic rays above 10^19eV observed with the Akeno Giant Air Shower Array
- Ultra-high energy cosmic rays without GZK cutoff
- Matter Creation via Vacuum Fluctuations in the Early Universe and Observed Ultra-High Energy Cosmic Ray Events
- Cluster Analysis of Extremely High Energy Cosmic Rays in the Northern Sky
- Signatures of Topological Defects
- Tracing protons through the Galactic magnetic field: a clue for charge composition of ultra-high energy cosmic rays
- GZK Violation - a Tempest in a (Magnetic) Teapot?
- Ultra-high energy cosmic rays from annihilation of superheavy dark matter
- Galactic Anisotropy as Signature of ``Top-Down'' Mechanisms of Ultra-High Energy Cosmic Rays
- Dark matter halos and the anisotropy of ultra-high energy cosmic rays
- The Anisotropy of the Ultra-High Energy Cosmic Rays