Particle theory

Research group

Research theme

Sub department

About

Related research groups

Observation of the suppression of the flux of cosmic rays above 4×1019eV

Physical Review Letters 101:6 (2008)

Authors:

J Abraham, P Abreu, M Aglietta, C Aguirre, D Allard, I Allekotte, J Allen, P Allison, J Alvarez-Muñiz, M Ambrosio, L Anchordoqui, S Andringa, A Anzalone, C Aramo, S Argirò, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, P Assis, BS Atulugama, J Aublin, M Ave, G Avila, T Bäcker, D Badagnani, AF Barbosa, D Barnhill, SLC Barroso, B Baughman, P Bauleo, JJ Beatty, T Beau, BR Becker, KH Becker, JA Bellido, S Benzvi, C Berat, T Bergmann, P Bernardini, X Bertou, PL Biermann, P Billoir, O Blanch-Bigas, F Blanco, P Blasi, C Bleve, H Blümer, M Boháčová, C Bonifazi, R Bonino, J Brack, P Brogueira, WC Brown, P Buchholz, A Bueno, RE Burton, NG Busca, KS Caballero-Mora, B Cai, DV Camin, L Caramete, R Caruso, W Carvalho, A Castellina, O Catalano, G Cataldi, L Cazon, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chudoba, J Chye, PDJ Clark, RW Clay, E Colombo, R Conceição, B Connolly, F Contreras, J Coppens, A Cordier, U Cotti, S Coutu, CE Covault, A Creusot, A Criss, J Cronin, A Curutiu, S Dagoret-Campagne, K Daumiller, BR Dawson, RM De Almeida, C De Donato, SJ De Jong, G De La Vega, WJMDM Junior

Abstract:

The energy spectrum of cosmic rays above 2.5×1018eV, derived from 20000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, JE-γ, at energies between 4×1018eV and 4×1019eV 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. © 2008 The American Physical Society.
More details from the publisher
More details
More details
Details from ArXiV

Erratum to “Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei” [Astroparticle Physics 29(3) (2008) 188–204]

Astroparticle Physics Elsevier 30:1 (2008) 45
More details from the publisher
More details

Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations

(2008)

Authors:

Paul Hunt, Subir Sarkar
More details from the publisher

Travelling waves and impact-parameter correlations

(2008)

Authors:

S Munier, GP Salam, G Soyez
More details from the publisher

Geometric Scaling from Dokshitzer-Gribov-Lipatov-Altarelli-Parisi Evolution

Physical Review Letters American Physical Society (APS) 101:2 (2008) 022001

Authors:

Fabrizio Caola, Stefano Forte
More details from the publisher
More details
More details