SUSY07

Session

Theoretical Models (String Theory and Formal Aspects of SUSY) 3

Models3

28 Jul 2007, 14:00

Physics Building (Karlsruhe University)

139. Flux Stabilization in 6 Dimensions: D-terms and Loop Corrections

Dr Michele Trapletti (ITP - Heidelberg University)

28/07/2007, 14:00

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

The D-terms induced by gauge theory fluxes in the context of 6-dimensional supergravity models are discussed. On the one hand, this is arguably the simplest concrete setting in which the controversial idea of `D-term uplifts' can be investigated. On the other hand, it is a very plausible intermediate step on the way from a 10d string theory model to 4d phenomenology. Our specific results...

191. Smooth heterotic compactifications and anomalous U(1)s

Dr Gabriele Honecker (CERN)

28/07/2007, 14:20

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

As recently shown, heterotic string compactifications on Calabi-Yau manifolds admit multiple anomalous U(1)s if the gauge background consists of several unitary bundles. Constructions of this type (including 5-branes also) considerably amplify the (standard) model building options on the one hand, and U(1) bundles reproduce (blow-ups of) heterotic Abelian orbifold models on the other hand.

248. F-term uplifting via consistent D-terms

Dr Oliver Eyton-Williams (Institute of Theoretical Physics, University of Warsaw, 00-681 Warsaw, Poland)

28/07/2007, 14:40

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

The issue of fine-tuning necessary to achieve satisfactory degree of hierarchy between moduli masses, the gravitino mass and the scale of the cosmological constant has been revisited in the context of supergravities with consistent D-terms. We have studied (extended) racetrack models where supersymmetry breaking and moduli stabilisation cannot be separated from each other. We show that...

384. Moduli Stabilization in Heterotic-Inspired Supergravity

Alexander Westphal (SISSA)

28/07/2007, 15:00

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

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...

103. Low energy SUSY from the heterotic string

Dr Oleg Lebedev (CERN)

28/07/2007, 15:20

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

I will describe how the MSSM can be constructed from the heterotic string and discuss consequences of this construction, in particular, in relation to the scale of SUSY breaking.

259. Measuring Fine tuning in Supersymmetry

Mr Peter Athron (Glasgow University)

28/07/2007, 15:40

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

The solution to fine tuning is one of the principal motivations for supersymmetry. However constraints on the parameter space of the Minimal Supersymmetric Standard Model (MSSM) suggest it may also require fine tuning (although to a much lesser extent). To compare this tuning with different extensions of the Standard Model (including other supersymmetric models) it is essential that we...