Probing Naked Singularities in Non-supersymmetric String Vacua

Abstract

We present a detailed analysis of non-supersymmetric spacetime varying string vacua which can lead to an exponential hierarchy between the electroweak and the gravitational scales. In particular, we identify a limit in which these vacua can be interpreted as supersymmetric vacua of F-theory. Furthermore, we study the properties of these solutions as seen by $D7$-brane probes and establish a non-supersymmetric analogue of the enhancon mechanism.

46 pages, Latex, 7 figures; the brane probe analysis (sections 3 and 4) has been revised, references added and typos corrected

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