Metastable String Vacua
arXiv:0704.2553 · doi:10.1016/j.physletb.2007.06.031
Abstract
We argue that tachyon-free type I string vacua with supersymmetry breaking in the open sector at the string scale can be interpreted, via S and T-duality arguments, as metastable vacua of supersymmetric type I superstring. The dynamics of the process can be partially captured via nucleation of brane-antibrane pairs out of the non-supersymmetric vacuum and subsequent tachyon condensation.
15 pages. v2 refs added and minor improvements
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