Final Results from the High Resolution Fly's Eye (HiRes) Experiment

Abstract

Final results from the High Resolution Fly's Eye (HiRes) on the observation of the Greisen-Zatsepin-Kuzmin cutoff in the cosmic ray spectrum are presented. We observe a cutoff consistent with the GZK predictions with a five sigma significance. The nature of the cosmic ray composition near the GZK cutoff is also discussed as well as possible correlations of the highest energy cosmic rays with AGNs and LSS in the Northern sky.

Invited paper presented at the XVI International Symposium on Very High Energy Cosmic Ray Interactions ISVHECRI 2010, Batavia, IL, USA (28 June - 2 July 2010). 6 pages, 8 figures. Revised figure 4

References in corpus (4)

• Measurement of the Depth of Maximum of Extensive Air Showers above 10^18 eV
• Search for Correlations between HiRes Stereo Events and Active Galactic Nuclei
• Measurement of the Flux of Ultra High Energy Cosmic Rays by the Stereo Technique
• Analysis of large-scale anisotropy of ultra-high energy cosmic rays in HiRes data

Cited by in corpus (11)

• Radio detection of Cosmic-Ray Air Showers and High-Energy Neutrinos
• The Cosmic-Ray Energy Spectrum between 2 PeV and 2 EeV Observed with the TALE detector in monocular mode
• Depth of shower maximum and mass composition of cosmic rays from 50 PeV to 2 EeV measured with the LOFAR radio telescope
• The Cosmic-Ray Composition between 2 PeV and 2 EeV Observed with the TALE Detector in Monocular Mode
• Neutron Oscillations to Parallel World: Earlier End to the Cosmic Ray Spectrum?
• On ultra-high energy cosmic rays: origin in AGN jets and transport in expanding Universe
• Study of longitudinal development of air showers in the knee energy range
• A relook at the GZK Neutrino-Photon Connection: Impact of Extra-galactic Radio Background & UHECR properties
• Measuring temporal characteristics of the Cherenkov radiation signal from extensive air showers of cosmic rays with a wide field-of-view telescope addendum to the Yakutsk array
• Simulation study of the correlation ($X_{max}^{\mu }$, $N^{\mu }$) in view of obtaining information on primary mass of the UHECRs
• Restoration of azimuthal symmetry of muon densities in extended air showers