Objective
One of the central tasks of fundamental physics is to derive an effective description at low energy from a more fundamental theory. In particular, superstring theory includes a large number of aspects of particle physics and general relativity. In this context, one of the key points is the mechanism of supersymmetry breaking. Its effective description contains important conceptual and phenomenological difficulties. That’s why we propose to consider the effective action and vacuum structure of non-supersymmetric orientifold compactifications of Type IIB string theory. Two essential features appear when supersymmetry is broken on configurations of branes. A dilaton tadpole is generated and the broken supersymmetry is realized on the world-volume of the branes in a non-linear way. This non-linear supersymmetry provides a very powerful tool for computing the off-shell brane effective action. We propose in particular to use it in order to explore the Kahler potential of matter fields beyond its quadratic approximation. This will allow us to better understand the field redefinition and the mass spectrum of these chiral fields. A second essential step toward a better understanding of vacua with broken supersymmetry is the stabilization of the dilaton. Indeed, the presence of a dilaton tadpole on the disk indicates an instability. We analyze its resolution by considering non-critical backgrounds. Using exact boundary conformal field theory methods, we propose to compute in details the sphere and disk contributions to the scalar potential. They arise respectively from the effective central charge and from supersymmetry breaking terms. Evidences for the existence of non-supersymmetric vacua at a perturbative regime will then be studied. These two complementary approaches will then enable us to propose stable non-supersymmetric branes constructions reproducing the basic features of the standard model of particle physics.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences relativistic mechanics
- natural sciences physical sciences theoretical physics particle physics
- natural sciences physical sciences theoretical physics string theory
- natural sciences mathematics applied mathematics mathematical physics conformal field theory
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP7-PEOPLE-2007-2-1-IEF
See other projects for this call
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
91128 PALAISEAU CEDEX
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.