Open Heterotic Strings

Details Open Heterotic Strings Open Heterotic Strings

2005-10-04

arxiv.org/abs/hep-th/0510033v2

JHEP 0609:082,2006

Physics

High Energy Physics

High Energy Physics - Theory

15 pages. v.2: typos, references corrected

Scientific paper

10.1088/1126-6708/2006/09/082

We classify potential cosmic strings according to the topological charge
measurable outside the string core. We conjecture that in string theory it is
this charge that governs the stability of long strings. This would imply that
the SO(32) heterotic string can have endpoints, but not the E_8 x E_8 heterotic
string. We give various arguments in support of this conclusion.

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