Are topological defects responsible for the 300 EeV cosmic rays?
نویسندگان
چکیده
منابع مشابه
Ultra-high-energy cosmic rays from relic topological defects
It is difficult for conventional sources to accelerate cosmic ray particles to the highest energies that have been observed. Topological defects such as monopoles and strings overcome this difficulty, because their natural energy scale is at or above the observed energies. Monopoles connected by strings are a particularly attractive source, because they would cluster in the galactic halo and th...
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In this paper we review the hypothesis that a substantial part of the cosmic ray ux observed above about 10 19 eV may be produced by decaying or annihilating topo-logical defects left over from phase transitions in the early universe at grand uniication energy scales (10 16 GeV). Possible signatures of cosmic ray producing defect models are discussed which could be tested experimentally in the ...
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It is pointed out that the observed extremely high energy cosmic rays (EHECR) above 10 GeV and the observed baryon asymmetry of the Universe (BAU), both may have a common origin in baryon number violating decays of supermassive “X” particles released from cosmic topological defects (TDs) such as cosmic strings and monopoles. The X particles produced by TDs in the recent epochs produce the EHECR...
متن کاملUltrahigh Energy Cosmic Rays from Topological Defects — Cosmic Strings, Monopoles, Necklaces, and All That
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 20 eV. Some massive parti...
متن کاملLectures on Cosmic Topological Defects
These lectures review certain topological defects and aspects of their cosmology. Unconventional material includes brief descriptions of electroweak defects, the structure of domain walls in non-Abelian theories, and the spectrum of magnetic monopoles in SU(5) Grand Unified theory.
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1996
ISSN: 0920-5632
DOI: 10.1016/0920-5632(96)00299-x