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 AGN's and local large scale structure in the Northern sky.
Nuclear Physics B Proceedings Supplements
- Pub Date:
- March 2011
- Astrophysics - High Energy Astrophysical Phenomena
- 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