Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-03-03
Phys.Rev.Lett. 81 (1998) 260-263
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, RevTex, no figures, discussions and references added, other minor changes, version to appear in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.81.260
It is pointed out that the observed extremely high energy cosmic rays (EHECR) above $10^{11}$ 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, while the BAU is created by X particles released from TDs mainly in the very early Universe. In this scenario the EHECR is predicted to contain baryons as well as antibaryons with a small asymmetry between the two.
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