INVESTIGADORES
MARIAZZI Analisa Gabriela
artículos
Título:
Observation of the suppression of the flux of cosmic rays above 4 x 1019 eV
Autor/es:
PIERRE AUGER COLLABORATION (J. ABRAHAM, ... , A. MARIAZZI, ET AL)
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
The American Physical Society (APS)
Referencias:
Año: 2008 vol. 101 p. 61101 - 61101
ISSN:
0031-9007
Resumen:
The energy spectrum of cosmic rays above 2.5×1018 eV, derived from 20 000 events recorded at the Pierre Auger Observatory, is described. The spectral index of the particle flux, JE-, at energies between 4×1018 eV and 4×1019 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.