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Cosmic Topological Defects, Highest Energy Cosmic Rays, and the Baryon Asymmetry of the Universe

Pijushpani Bhattacharjee
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Abstract

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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Pijushpani Bhattacharjee. 1998-06-04. Cosmic Topological Defects, Highest Energy Cosmic Rays, and the Baryon Asymmetry of the Universe. https://doi.org/10.1103/physrevlett.81.260

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