Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-04-07
JHEP 0806:057,2008
Physics
High Energy Physics
High Energy Physics - Theory
34 pages, LaTex. v2 typos corrected. v3 published version
Scientific paper
10.1088/1126-6708/2008/06/057
We perform a general analysis on the possibility of obtaining metastable vacua with spontaneously broken N=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 Kahler 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 Kahler potential which break the no-scale property may allow to lift these masses.
Covi Laura
Gomez-Reino Marta
Gross Christian
Louis Jan
Palma Gonzalo A.
No associations
LandOfFree
de Sitter vacua in no-scale supergravities and Calabi-Yau string models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with de Sitter vacua in no-scale supergravities and Calabi-Yau string models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and de Sitter vacua in no-scale supergravities and Calabi-Yau string models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-729955