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Phys Rev Lett
; 100(10): 101101, 2008 Mar 14.
Artigo
em Inglês
| MEDLINE
| ID: mdl-18352170
RESUMO
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.
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Phys Rev D Part Fields
; 31(9): 2192-2198, 1985 May 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-9955950
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Phys Rev D Part Fields
; 46(8): 3248-3255, 1992 Oct 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10015269
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Phys Rev D Part Fields
; 47(5): 1919-1932, 1993 Mar 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10015774