INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Constraints on top-down models for the origin of UHECRs from the Pierre Auger Observatory data
PIERRE AUGER COLLABORATION (J. ABRAHAM, ... , A. MARIAZZI, ET AL)
Conferencia; 30th International Cosmic Ray Conference; 2007
In the context of the report by the AGASA experiment of an apparent excess in thecosmic ray flux above the energy of the expected GZK feature, a variety of "top-downmodels" have been proposed for the origin of ultra-high-energy cosmic rays (UHECRs).These models involve the decay of supermassive particles and generically predict highneutrino and photon fluxes at ultra-high energy. Relying on the corresponding fluxlimits and overall spectrum normalisation obtained by the Pierre Auger Observatory,we set constraints on a wide class of top-down models and their contribution to theUHECR flux.