Article Dans Une Revue Journal of High Energy Physics, Gravitation and Cosmology Année : 2007

Tree-level stability without spacetime fermions: novel examples in string theory

Dan Israël
Vasilis Niarchos
  • Fonction : Auteur

Résumé

Is perturbative stability intimately tied with the existence of spacetime fermions in string theory in more than two dimensions? Type 0'B string theory in ten-dimensional flat space is a rare example of a non-tachyonic, non-supersymmetric string theory with a purely bosonic closed string spectrum. However, all known type 0' constructions exhibit massless NSNS tadpoles signaling the fact that we are not expanding around a true vacuum of the theory. In this note, we are searching for perturbatively stable examples of type 0' string theory without massless tadpoles in backgrounds with a spatially varying dilaton. We present two examples with this property in non-critical string theories that exhibit four- and six-dimensional Poincaré invariance. We discuss the D-branes that can be embedded in this context and the type of gauge theories that can be constructed in this manner. We also comment on the embedding of these non-critical models in critical string theories and their holographic (Little String Theory) interpretation and propose a general conjecture for the role of asymptotic supersymmetry in perturbative string theory.

Dates et versions

hal-03646586 , version 1 (19-04-2022)

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Dan Israël, Vasilis Niarchos. Tree-level stability without spacetime fermions: novel examples in string theory. Journal of High Energy Physics, Gravitation and Cosmology, 2007, 2007, ⟨10.1088/1126-6708/2007/07/065⟩. ⟨hal-03646586⟩
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