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- W2166116775 abstract "We perform a general analysis on the possibility of obtaining metastable vacua with spontaneously broken = 1 supersymmetry and non-negative cosmological constant in the moduli sector of string models. More specifically, we study the condition under which the scalar partners of the Goldstino are non-tachyonic, which depends only on the Kähler potential. This condition is not only necessary but also sufficient, in the sense that all of the other scalar fields can be given arbitrarily large positive square masses if the superpotential is suitably tuned. We consider both heterotic and orientifold string compactifications in the large-volume limit and show that the no-scale property shared by these models severely restricts the allowed values for the `sGoldstino' masses in the superpotential parameter space. We find that a positive mass term may be achieved only for certain types of compactifications and specific Goldstino directions. Additionally, we show how subleading corrections to the Kähler potential which break the no-scale property may allow to lift these masses." @default.
- W2166116775 created "2016-06-24" @default.
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- W2166116775 date "2008-06-16" @default.
- W2166116775 modified "2023-10-17" @default.
- W2166116775 title "De Sitter vacua in no-scale supergravities and Calabi-Yau string models" @default.
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- W2166116775 doi "https://doi.org/10.1088/1126-6708/2008/06/057" @default.
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