Grand unified theories, topological defects, and ultrahigh-energy cosmic rays

The ultrahigh-energy (UHE) proton and neutrino spectra resulting from collapse or annihilations of topological defects surviving from the GUT era are calculated. Irrespective of the specific process under consideration (which determines the overall normalization of the spectrum), the UHE proton spec...

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Bibliographic Details
Published in:Physical review letters 1992-07, Vol.69 (4 Ju), p.567-570
Main Authors: Bhattacharjee, Pijushpani, Hill, Christopher T., Schramm, David N.
Format: Article
Language:English
Subjects:
BASIC INTERACTIONS
BOSONS
COSMIC RADIATION
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
IONIZING RADIATIONS
LEPTONIC DECAY
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICS
MESONS
NEUTRINOS
NEUTRON SPECTRA
NUMERICAL ANALYSIS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
Particle Systematics > Unified Theories & Models > (1992-)
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PIONS
PROTON SPECTRA
PSEUDOSCALAR MESONS
RADIATIONS
Space Radiation
SPECTRA
TOPOLOGY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEAK INTERACTIONS
WEAK PARTICLE DECAY 662210 > Specific Theories & Interaction Models
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Description
Summary:The ultrahigh-energy (UHE) proton and neutrino spectra resulting from collapse or annihilations of topological defects surviving from the GUT era are calculated. Irrespective of the specific process under consideration (which determines the overall normalization of the spectrum), the UHE proton spectrum always 'recovers' at approximately 1.8 x 10 exp 11 GeV after a partial Greisen-Zatsepin-Kuz'min 'cutoff' at approximately 5 x 10 exp 10 GeV and continues to a GUT-scale energy with a universal shape determined by the physics of hadronic jet fragmentation. Implications of the results are discussed.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.69.567