High energy particles from monopoles connected by strings

被引:44
作者
Berezinsky, V [1 ]
Martin, X [1 ]
Vilenkin, A [1 ]
机构
[1] TUFTS UNIV,INST COSMOL,DEPT PHYS & ASTRON,MEDFORD,MA 02155
来源
PHYSICAL REVIEW D | 1997年 / 56卷 / 04期
关键词
D O I
10.1103/PhysRevD.56.2024
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Monopole-antimonopole pairs connected by strings and monopole-string networks with N>2 strings attached to each monopole can be formed at phase transitions in the early universe. In such hybrid defects, monopoles accelerate under the string tension and can reach ultrarelativistic Lorentz factors gamma much greater than 1. We study the radiation of gauge quanta by accelerating monopoles. For monopoles with a chromamagnetic charge, we also discuss the high-energy hadron production through emission of virtual gluons and their subsequent fragmentation into hadrons. The relevant parameter Tor gauge boson radiation is M/a where M is the boson mass and a is the proper acceleration or the monopole. For M much less than a, the gauge bosons can be considered as massless and the typical energy of the emitted quanta is E similar to gamma a. Tn the opposite limit M much greater than a, the radiation power is exponentially suppressed and gauge quanta are emitted with a typical energy E similar to gamma M in a narrow range Delta E/E similar to(a/M)(1/2). Cosmological monopole-string networks can product photons and hadrons of extremely high energies. For a wide range of parameters these energies can be much greater than the Planck scale.
引用
收藏
页码:2024 / 2034
页数:11
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