Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-01-08
Physics
High Energy Physics
High Energy Physics - Theory
11pages, no figures
Scientific paper
In this paper, we consider half-integer charged particles predicted by models of orbifold compactification of the $E_8\times E_8$ heterotic string theory. We find that it is possible for half-integer charged particles to exist in our universe, and the location of half-interger charged particles in a galaxy should be in the centers of the galaxy. By qualitative analysis, we find half-interger charged particles may be helpful in explaining the formation of SMBH at the large redshift and solving the UHECR puzzle.
Sun Cheng-Yi
Zhang Da-Hua
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