Speaker
Rob Knoops
(KU Leuven (BE))
Description
We explore the phenomenology of a supergravity theory based on a gauged R-symmetry.
The model contains a chiral multiplet S, which can be the string dilaton or a compactification modulus, that has a gauged shift symmetry.
Supersymmetry is then broken by a combination of F-term and D-term breaking, and allows for a tunable (parametrically small and positive) cosmological constant.
We calculate the soft supersymmetry breaking terms and show that an extra field is needed in the hidden sector to prevent tachyonic scalar^2 masses for the MSSM sparticles.
Gaugino masses are generated at one-loop by the so-called ‘anomaly mediation’ mechanism. We show that after a Kahler transformation, part of this mass can be retraced to a Green-Schwarz counter term that is needed to cancel the anomalous R-symmetry.
Phenomenological implications are discussed.
Authors
Ignatios Antoniadis
(UPMC)
Rob Knoops
(KU Leuven (BE))
