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Title: Ultrahigh energy cosmic rays from topological defects--cosmic strings, monopoles, necklaces, and all that

Abstract

The topological defect scenario of origin of the observed highest energy cosmic rays is reviewed. Under a variety of circumstances, topological defects formed in the early Universe can be sources of very massive particles in the Universe today. The decay products of these massive particles may be responsible for the observed highest energy cosmic ray particles above 10{sup 20} eV. Some massive particle production processes involving cosmic strings and magnetic monopoles are discussed. We also discuss the implications of results of certain recent numerical simulations of evolution of cosmic strings. These results (which remain to be confirmed by independent simulations) seem to show that massive particle production may be a generic feature of cosmic strings, which would make cosmic strings an inevitable source of extremely high energy cosmic rays with potentially detectable flux. At the same time, cosmic strings are severely constrained by the observed cosmic ray flux above 10{sup 20} eV, if massive particle radiation is the dominant energy loss mechanism for cosmic strings.

Authors:
 [1]
  1. Laboratory for High Energy Astrophysics, NASA/Goddard Space Flight Center, Code 661, Greenbelt, Maryland 20771 (United States)
Publication Date:
OSTI Identifier:
21199242
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 433; Journal Issue: 1; Conference: Workshop on observing giant cosmic ray air showers from >10{sup 20} eV particles from space, College Park, MD (United States), 13-15 Nov 1997; Other Information: DOI: 10.1063/1.56108; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMIC RADIATION; COSMIC RAY FLUX; COSMOLOGY; EEV RANGE; ENERGY LOSSES; ENERGY SPECTRA; MAGNETIC MONOPOLES; PARTICLE PRODUCTION; PHASE TRANSFORMATIONS; REST MASS; STRING MODELS; SUPERSYMMETRY; SYMMETRY BREAKING; TOPOLOGY; UNIVERSE

Citation Formats

Bhattacharjee, Pijushpani, and Indian Institute of Astrophysics, Bangalore-560 034. Ultrahigh energy cosmic rays from topological defects--cosmic strings, monopoles, necklaces, and all that. United States: N. p., 1998. Web. doi:10.1063/1.56108.
Bhattacharjee, Pijushpani, & Indian Institute of Astrophysics, Bangalore-560 034. Ultrahigh energy cosmic rays from topological defects--cosmic strings, monopoles, necklaces, and all that. United States. https://doi.org/10.1063/1.56108
Bhattacharjee, Pijushpani, and Indian Institute of Astrophysics, Bangalore-560 034. Mon . "Ultrahigh energy cosmic rays from topological defects--cosmic strings, monopoles, necklaces, and all that". United States. https://doi.org/10.1063/1.56108.
@article{osti_21199242,
title = {Ultrahigh energy cosmic rays from topological defects--cosmic strings, monopoles, necklaces, and all that},
author = {Bhattacharjee, Pijushpani and Indian Institute of Astrophysics, Bangalore-560 034},
abstractNote = {The topological defect scenario of origin of the observed highest energy cosmic rays is reviewed. Under a variety of circumstances, topological defects formed in the early Universe can be sources of very massive particles in the Universe today. The decay products of these massive particles may be responsible for the observed highest energy cosmic ray particles above 10{sup 20} eV. Some massive particle production processes involving cosmic strings and magnetic monopoles are discussed. We also discuss the implications of results of certain recent numerical simulations of evolution of cosmic strings. These results (which remain to be confirmed by independent simulations) seem to show that massive particle production may be a generic feature of cosmic strings, which would make cosmic strings an inevitable source of extremely high energy cosmic rays with potentially detectable flux. At the same time, cosmic strings are severely constrained by the observed cosmic ray flux above 10{sup 20} eV, if massive particle radiation is the dominant energy loss mechanism for cosmic strings.},
doi = {10.1063/1.56108},
url = {https://www.osti.gov/biblio/21199242}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 433,
place = {United States},
year = {1998},
month = {6}
}