Has the GZK cutoff been discovered?

We show that the combined observational data from the Fly's Eye, HiRes, and Yakutsk cosmic ray experiments strongly suggest (~ 7 sigma) that the Greisen-Zatsepin-Kuzmin (GZK) cutoff is present in the observed energy spectrum of ultra-high-energy cosmic rays. However, Top-Down models which invok...

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Bibliographic Details
Main Authors: Bahcall, J N, Waxman, E
Language:English
Published: 2002
Subjects:
Particle Physics - Phenomenology
Yakutsk
Online Access:http://cds.cern.ch/record/563893
id ftcern:oai:cds.cern.ch:563893
record_format openpolar
spelling ftcern:oai:cds.cern.ch:563893 2023-05-15T18:45:24+02:00 Has the GZK cutoff been discovered? Bahcall, J N Waxman, E 2002-06-22 http://cds.cern.ch/record/563893 eng eng http://cds.cern.ch/record/563893 hep-ph/0206217 oai:cds.cern.ch:563893 Particle Physics - Phenomenology 2002 ftcern 2018-07-28T05:33:33Z We show that the combined observational data from the Fly's Eye, HiRes, and Yakutsk cosmic ray experiments strongly suggest (~ 7 sigma) that the Greisen-Zatsepin-Kuzmin (GZK) cutoff is present in the observed energy spectrum of ultra-high-energy cosmic rays. However, Top-Down models which invoke decaying heavy particles are consistent with the AGASA cosmic ray data. High statistics measurements in the cosmic ray energy range between 10^{18} eV to 5*10^{19} eV will be necessary to test for the characteristic differences between Top-Down models and more conventional models. Other/Unknown Material Yakutsk CERN Document Server (CDS) Yakutsk
institution Open Polar
collection CERN Document Server (CDS)
op_collection_id ftcern
language English
topic Particle Physics - Phenomenology
spellingShingle Particle Physics - Phenomenology
Bahcall, J N
Waxman, E
Has the GZK cutoff been discovered?
topic_facet Particle Physics - Phenomenology
description We show that the combined observational data from the Fly's Eye, HiRes, and Yakutsk cosmic ray experiments strongly suggest (~ 7 sigma) that the Greisen-Zatsepin-Kuzmin (GZK) cutoff is present in the observed energy spectrum of ultra-high-energy cosmic rays. However, Top-Down models which invoke decaying heavy particles are consistent with the AGASA cosmic ray data. High statistics measurements in the cosmic ray energy range between 10^{18} eV to 5*10^{19} eV will be necessary to test for the characteristic differences between Top-Down models and more conventional models.
author Bahcall, J N
Waxman, E
author_facet Bahcall, J N
Waxman, E
author_sort Bahcall, J N
title Has the GZK cutoff been discovered?
title_short Has the GZK cutoff been discovered?
title_full Has the GZK cutoff been discovered?
title_fullStr Has the GZK cutoff been discovered?
title_full_unstemmed Has the GZK cutoff been discovered?
title_sort has the gzk cutoff been discovered?
publishDate 2002
url http://cds.cern.ch/record/563893
geographic Yakutsk
geographic_facet Yakutsk
genre Yakutsk
genre_facet Yakutsk
op_relation http://cds.cern.ch/record/563893
hep-ph/0206217
oai:cds.cern.ch:563893
_version_ 1766236458667999232

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