1.
Phys Rev Lett
; 100(10): 101101, 2008 Mar 14.
Article
in English
| MEDLINE
| ID: mdl-18352170
ABSTRACT
The High Resolution Fly's Eye (HiRes) experiment has observed the Greisen-Zatsepin-Kuzmin suppression (called the GZK cutoff) with a statistical significance of five standard deviations. HiRes' measurement of the flux of ultrahigh energy cosmic rays shows a sharp suppression at an energy of 6 x 10(19) eV, consistent with the expected cutoff energy. We observe the ankle of the cosmic-ray energy spectrum as well, at an energy of 4 x 10(18) eV. We describe the experiment, data collection, and analysis and estimate the systematic uncertainties. The results are presented and the calculation of the statistical significance of our observation is described.
2.
3.
Phys Rev D Part Fields
; 47(5): 1919-1932, 1993 Mar 01.
Article
in English
| MEDLINE
| ID: mdl-10015774
4.
Phys Rev D Part Fields
; 46(8): 3248-3255, 1992 Oct 15.
Article
in English
| MEDLINE
| ID: mdl-10015269
5.
Phys Rev D Part Fields
; 42(2): 281-288, 1990 Jul 15.
Article
in English
| MEDLINE
| ID: mdl-10012844
6.
7.
8.
Phys Rev D Part Fields
; 31(9): 2192-2198, 1985 May 01.
Article
in English
| MEDLINE
| ID: mdl-9955950
9.