%0 Journal Article
%T Hard component of ultra-high energy cosmic rays and vortons
%A Luis Masperi
%A Milva Orsaria
%J Physics
%D 2000
%I arXiv
%R 10.1016/S0927-6505(01)00119-0
%X 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.
%U http://arxiv.org/abs/astro-ph/0005593v2