Hard component of ultra-high energy cosmic rays and vortons
Astrophysics
2009-10-31 v2
Abstract
Observed events of ultra-high energy cosmic rays may indicate a hard component for the energy spectrum of their flux, which might have origin in the decay of long-lived vortons presumably condensed in the galactic halo. To be consistent with the needed present density, vortons may have been formed during the breaking of an abelian symmetry contained in a large GUT group like E6 and a part of them could have survived the destabilization caused by the electroweak transition.
Cite
@article{arxiv.astro-ph/0005593,
title = {Hard component of ultra-high energy cosmic rays and vortons},
author = {Luis Masperi and Milva Orsaria},
journal= {arXiv preprint arXiv:astro-ph/0005593},
year = {2009}
}
Comments
accepted version to appear in Astroparticle Physics. 24 pages, 3 figures. Enlarged discussion on vortons formation and GUT models