Observation of the Suppression of the Flux of Cosmic Rays above 4 × 1019 eV
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| dc.contributor.author | Santander, Marcos | |
| dc.date.accessioned | 2019-07-03T15:26:45Z | |
| dc.date.available | 2019-07-03T15:26:45Z | |
| dc.date.copyright | 2008 | |
| dc.date.issued | 2008-08-04 | |
| dc.identifier.citation | Abraham, J., et al. (2008): Observation of the Suppression of the Flux of Cosmic Rays above 4 × 1019 eV. Physical Review Letters, 101(6). DOI: http://dx.doi.org/10.1103/PhysRevLett.101.061101 | en_US |
| dc.identifier.issn | 0031-9007 | |
| dc.identifier.uri | http://ir.ua.edu/handle/123456789/5893 | |
| dc.description.abstract | The energy spectrum of cosmic rays above 2.5 x 10^18 eV, derived from 20 000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, J ∝ E^-y, at energies between 4 x 10^18 eV and 4 X 10^19 eV is 2.69 ± 0.02(stat) ± 0.06(syst), steepening to 4.2 ± 0.4(stat) ± 0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz’min. | en_US |
| dc.format.mimetype | application/pdf | en_US |
| dc.language | English | en_US |
| dc.publisher | American Physical Society | en_US |
| dc.subject | Cosmic rays | en_US |
| dc.subject | Neutrino, muon, pion, and other elementary particles | en_US |
| dc.subject | Composition, energy spectra and interactions | en_US |
| dc.subject | Extensive air showers | en_US |
| dc.title | Observation of the Suppression of the Flux of Cosmic Rays above 4 × 1019 eV | en_US |
| dc.type | text | en_US |
| dc.rights.holder | American Physical Society | en_US |
