186 citations · 349 across the 4 of their papers we have counts for
4 papers
The partition function of the supersymmetric two-dimensional black hole and little string theory
Dan Israel, Costas Kounnas, Ari Pakman +1
We compute the partition function of the supersymmetric two-dimensional Euclidean black hole geometry described by the SL(2,R)/U(1) superconformal field theory. We decompose the re…
Five-Brane Configurations without a Strong Coupling Regime
E. Kiritsis, C. Kounnas, P. M. Petropoulos +1
Five-brane distributions with no strong coupling problems and high symmetry are studied. The simplest configuration corresponds to a spherical shell of branes with S^3 geometry and…
Mass formulae and natural hierarchy in string effective supergravities
S. Ferrara, C. Kounnas, F. Zwirner
We study some conditions for the hierarchy to occur naturally in a generic effective supergravity theory. Absence of fine-tuning and perturbative calculability req…
A Large Class of New Gravitational and Axionic Backgrounds for Four-Dimensional Superstrings
E. Kiritsis, C. Kounnas, D. Lust
A large class of new 4-D superstring vacua with non-trivial/singular geometries, spacetime supersymmetry and other background fields (axion, dilaton) are found. Killing symmetries…