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...
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.
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...
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...
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.
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...