Speaker
Alexander Westphal
(SISSA)
Description
We discuss moduli stabilization and supersymmetry breaking in the
context of the 4d supergravity arising from the heterotic orbifold
compactifications. We show that non-perturbative effects alone can
lead to a racetrack superpotential which stabilizes the moduli in a
supersymmetric minimum and generating a mass hierarchy between the
dilaton and the Kahler moduli similar to the KKLT proposal in type
IIB. We then study the possibility of realizing within the heterotic
string constraints an additional sector which realizes the
Intriligator-Seiberg-Shih (ISS) model of meta-stable supersymmetry
breaking. In combination this gives a scenario for moduli
stabilization in a dS vacuum in the heterotic string with the AdS
cosmological constant cancelled by meta-stable supersymmetry breaking
along the lines of ISS.
Author
Alexander Westphal
(SISSA)