Ultra High Energy Cosmic Ray Protons: Signatures and Observations
The status of the Greisen-Zatsepin-Kuzmin (GZK) cutoff and pair-production dip in Ultra High Energy Cosmic Rays (UHECR) is discussed. They are the features in the spectrum of protons propagating through CMB radiation in extragalactic space, and discovery of these features implies that primary partic...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.243.8454 2023-05-15T18:45:27+02:00 Ultra High Energy Cosmic Ray Protons: Signatures and Observations V. Berezinsky A The Pennsylvania State University CiteSeerX Archives 901 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.243.8454 http://arxiv.org/pdf/0901.0254v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.243.8454 http://arxiv.org/pdf/0901.0254v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/0901.0254v1.pdf text ftciteseerx 2016-01-07T19:20:57Z The status of the Greisen-Zatsepin-Kuzmin (GZK) cutoff and pair-production dip in Ultra High Energy Cosmic Rays (UHECR) is discussed. They are the features in the spectrum of protons propagating through CMB radiation in extragalactic space, and discovery of these features implies that primary particles are mostly extragalactic protons. The spectra measured by AGASA, Yakutsk, HiRes and Auger detectors are in good agreement with the pair-production dip, and HiRes data have strong evidences for the GZK cutoff. The Auger spectrum, as presented at the 30th ICRC 2007, agrees with the GZK cutoff, too. The AGASA data agree well with the beginning of the GZK cutoff at E < ∼ 8 × 10 19 eV, but show the excess of events at higher energies, the origin of which is not understood. The difference in the absolute fluxes measured by different detectors disappears after energy shift within the systematic errors of each experiment. 1. Text Yakutsk Unknown Yakutsk |
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The status of the Greisen-Zatsepin-Kuzmin (GZK) cutoff and pair-production dip in Ultra High Energy Cosmic Rays (UHECR) is discussed. They are the features in the spectrum of protons propagating through CMB radiation in extragalactic space, and discovery of these features implies that primary particles are mostly extragalactic protons. The spectra measured by AGASA, Yakutsk, HiRes and Auger detectors are in good agreement with the pair-production dip, and HiRes data have strong evidences for the GZK cutoff. The Auger spectrum, as presented at the 30th ICRC 2007, agrees with the GZK cutoff, too. The AGASA data agree well with the beginning of the GZK cutoff at E < ∼ 8 × 10 19 eV, but show the excess of events at higher energies, the origin of which is not understood. The difference in the absolute fluxes measured by different detectors disappears after energy shift within the systematic errors of each experiment. 1. |
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The Pennsylvania State University CiteSeerX Archives |
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author |
V. Berezinsky A |
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V. Berezinsky A Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
author_facet |
V. Berezinsky A |
author_sort |
V. Berezinsky A |
title |
Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
title_short |
Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
title_full |
Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
title_fullStr |
Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
title_full_unstemmed |
Ultra High Energy Cosmic Ray Protons: Signatures and Observations |
title_sort |
ultra high energy cosmic ray protons: signatures and observations |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.243.8454 http://arxiv.org/pdf/0901.0254v1.pdf |
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Yakutsk |
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Yakutsk |
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Yakutsk |
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Yakutsk |
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http://arxiv.org/pdf/0901.0254v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.243.8454 http://arxiv.org/pdf/0901.0254v1.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766236507326119936 |