Mr
Andrey Katz
(Technion- Israel Institute of Technology)

7/31/07, 2:00 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We revisit N_f=N_c SQCD and its non-supersymmetric minima conjectured by
Intriligator, Seiberg and Shih . We argue that the existence of such minima depends
on the signs of three non-calculable parameters and that no evidence can be inferred
by deforming the theory. We demonstrate this by studying a different deformation of
the theory which involves additional gauge singlets. We show...

Mr
Felix Bruemmer
(Heidelberg University)

7/31/07, 2:20 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

A model of metastable dynamical supersymmetry breaking is presented in which all
scales are generated dynamically. The construction is a simple variant of the
Intriligator-Seiberg-Shih model. It contains no dimensionful parameters, and does not
rely on higher-dimensional operators to generate a small quark mass scale.

Mr
Luca Ferretti
(SISSA/ISAS)

7/31/07, 2:40 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

O'Raifeartaigh models with general R-charge assignments can have vacua where both
supersymmetry and R-symmetry are spontaneously broken. Most of these vacua are
metastable because the potential shows a runaway behaviour. We explain the relation
between runaway directions and R-symmetry, and we discuss the origin of metastability
in these models. Besides, we show models with global...

Mr
Rouven Essig
(Rutgers University)

7/31/07, 3:00 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We construct a model with long-lived metastable vacua in which all the
relevant parameters, including the supersymmetry breaking scale, are
generated dynamically by dimensional transmutation. Our model consists
of two sectors coupled by a singlet and combines dynamical supersymmetry
breaking with an O'Raifeartaigh mechanism in terms of confined variables.
The metastable vacua appear...

Dr
Stefan Groot Nibbelink
(Heidelberg University)

7/31/07, 3:20 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

Heterotic orbifold models are promising candidates for models with
MSSM like spectra. But orbifolds only correspond to a special place in
moduli space, the bigger picture is described by the moduli space of
Calabi-Yau spaces. In this talk we will make explicit connections
between both pictures. To this end we study blowups of orbifold
singularities, to this end we use both explicit...

Kerim Suruliz
(Cambridge)

7/31/07, 3:40 PM

Theoretical Models (String Theory and Formal Aspects of SUSY)

Parallel Talk

We review the phenomenologically attractive Large Volume compactifications of Type IIB string theory. Soft terms for a general intersecting magnetised D7 brane MSSM model are computed within this class of compactifications, away from the dilute flux limit. The resulting low energy spectra are found using RG running, including effects of uncertainties due to lack of an explicit MSSM embedding....