Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-02-14
Nucl.Phys. B421 (1994) 343-372
Physics
High Energy Physics
High Energy Physics - Theory
37 pages, CERN-TH.7148/94 Additional comments were added concerning the ${\hat c}_M=5$ super-Liouville theory
Scientific paper
10.1016/0550-3213(94)90331-X
We construct a new class of exact and stable superstring solutions based on $N=4$ superconformal world-sheet symmetry. In a subclass of these, the full spectrum of string excitations is derived in a modular-invariant way. In the weak curvature limit, our solutions describe a target space with non-trivial metric and topology, and generalize the previously known (semi) wormhole. The effective field theory limit is identified in certain cases, with solutions of the $N=4$ and $N=8$ extended gauged supergravities, in which the number of space-time supersymmetries is reduced by a factor of 2 because of the presence of non-trivial dilaton, gravitational and/or gauge backgrounds. In the context of string theory, our solutions correspond to stable non-critical superstrings in the strong coupling region; the super-Liouville field couples to a unitary matter system with central charge $5\le{\hat c}_M\le 9$.
Antoniadis Ignatios
Ferrara Sergio
Kounnas Costas
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