Cosmic necklaces and ultrahigh energy cosmic rays

被引：128

作者：

Berezinsky, V ^{[1
]}

Vilenkin, A

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

[2] Tufts Univ, Inst Cosmol, Dept Phys & Astron, Medford, MA 02155 USA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.79.5202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cosmic necklaces are hybrid topological defects consisting of monopoles and strings, with two strings attached to each monopole. We argue that the cosmological evolution of necklaces may significantly differ from that of cosmic strings. The typical velocity of necklaces can be much smaller than the speed of light, and the characteristic scale of the network much smaller than the horizon. We estimate the flux of high-energy protons produced by monopole annihilation in the decaying closed loops. For some reasonable values of the parameters it is comparable to the observed flux of ultrahigh-energy cosmic rays. [S0031-9007(97)04934-X].

引用

页码：5202 / 5205

页数：4

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