Dr
Stéphane Lavignac
(IPhT Saclay)
23/08/2010, 16:12
Model
The experimental signatures of supersymmetric extensions
of the Standard Model, such as the Minimal Supersymmetric
Standard Model (MSSM), depend on the actual spectrum of
superpartners, which in turn is determined by the mechanism
responsible for the breaking of supersymmetry and for its mediation
to the MSSM. An attractive possibility, known as gauge mediation,
is that supersymmetry...
Mr
Toshifumi Yamada
(Sokendai, KEK)
23/08/2010, 16:29
Model
We consider gaugino-mediated SUSY breaking in 5D warped spacetime, where matter is localized on the UV brane, main source of SUSY breaking is on the IR brane and gauge and Higgs superfields propagate in the bulk. We show that warped geometry in gaugino-mediation framework is required from the point of view of SUSY fine-tuning problem. Also, warped spacetime solves the stau LSP problem of...
Dr
Mark Goodsell
(DESY, Hamburg)
23/08/2010, 16:46
Model
We investigate the building of models with Dirac gauginos and perturbative gauge coupling unification. Here, in contrast to the MSSM, additional fields are required for unification, and these can naturally play the role of the messengers of supersymmetry breaking. We discuss the constraints upon such models, present a framework within which such models can be constructed, and give some example...
Mr
Eita Nakamura
(University of Tokyo)
23/08/2010, 17:03
Model
Among models of supersymmetric extension of the Standard Model, low-energy gauge mediation models are very attractive, since they avoid the problem of flavor changing neutral current and are free from the notorious gravitino problem. Strongly interacting gauge mediation models are those with messengers, which are strongly coupled to a SUSY-breaking hidden sector. These models have a stable...
Dr
Alberto Mariotti
(VUB)
23/08/2010, 17:20
Model
After an overview of known models of gauge mediation of supersymmetry breaking, I will describe one specific framework, known as semi-direct gauge mediation, which arises quite generically in string/D-brane models. Using a general gauge mediation formalism I discuss the generic phenomenological properties of this scenario, and the way to take advantage of its apparent problems, as well as...
John Kehayias
(University of California, Santa Cruz)
23/08/2010, 17:37
Model
One can define generalized models of gaugino condensation as theories which dynamically break a discrete R-symmetry, but do not break supersymmetry. We consider general examples consisting of gauge and matter fields, and the minimal number of gauge singlet fields to avoid flat directions in the potential. We explore which R-symmetries can arise, and their spontaneous breaking. In general, for...
Dr
Kobakhidze Archil
(The University of Melbourne)
23/08/2010, 17:54
Model
We propose a new realization of softly broken supersymmetric theories as theories defined on stochastic superspace. At the classical level, the supersymmetry breaking is parameterized in terms of a single (in general complex) mass parameter, $\xi$, describing the stochasticity of the Grassmannian superspace coordinates. In the context of the standard model with stochastic supersymmetry, the...
