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7 papers · 2 filters
Neutrino probe of cosmic ray astrophysics and new physics at sub-fermi distances
Luis A. Anchordoqui
We show that if the evolution of cosmic ray sources follows that of active galactic nuclei, the upper limit on the diffuse flux of tau neutrinos from the Pierre Auger Observatory m…
Investigation of Hadronic Interactions at Ultra-High Energies with the Pierre Auger Observatory
Ralf Ulrich
The aim of the Pierre Auger Observatory is the investigation of the nature of cosmic ray particles at ultra-high energies. It can simultaneously observe the longitudinal air shower…
Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
The Pierre Auger Collaboration, J. Abraham, P. Abreu +458
From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (a…
Limit on the diffuse flux of ultra-high energy tau neutrinos with the surface detector of the Pierre Auger Observatory
The Pierre Auger Collaboration
Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming may interact…
Measurements of the Muon Content of UHECR Air Showers with the Pierre Auger Observatory
Fabian Schmidt
The Pierre Auger Observatory, recently completed, has been operational since 2004. As a hybrid experiment, it allows for a wide range of measurements of UHECR-induced extensive air…
Search for clustering of ultra high energy cosmic rays from the Pierre Auger Observatory
Silvia Mollerach
We present the results of a search for clustering among the highest energy events detected by the surface detector of the Pierre Auger Observatory between 1 January 2004 and 31 Aug…