Supersymmetry Breaking in String Theory * LANCE
نویسنده
چکیده
I briefly review the problems with previous investigations of supersymmetry breaking in string theory 1 at tree-level, at one-loop, and non-perturbatively. A variant of the original non-perturbative scenario is proposed, in which gaugino condensation takes place in two different strongly-interacting hidden-sector gauge groups. In the new scenario it is possible to generate a large hierarchy of mass scales and to simultaneously stabilize the dilaton at a large expectation value (weak coupling). However, it is still uncertain whether supersymmetry is broken in such a vacuum.
منابع مشابه
On Supersymmetry Breaking in String Theory and its Realization in Brane Worlds
We use string duality to describe instanton induced spontaneous supersymmetry breaking in string compactifications with additional background fields. Dynamical supersymmetry breaking by space-time instantons in the heterotic string theory is mapped to a tree level breaking in the type II string which can be explicitly calculated by geometric methods. The point particle limit describes the non-p...
متن کاملStatus of Supersymmetry Breaking in String Theory*
Recent developments in understanding supersymmetry breaking in superstring theory are summarized. Presented at Particles and Fields ‘91, Vancouver, BC, Canada, August 18-22, 1991 * Work supported by the Department of Energy, contract DE-AC03-76SF00515. Superstring theory appears to be a viable candidate for a consistent theory of quantum gravity which also bears the possibility of unifying of a...
متن کاملRealistic Cosmological Constant
Scenarios of supersymmetry breaking at various scales from TeV to GUT to the string are generated. A previous analysis generated the value of the experimentally measured cosmological constant from supersymmetry breaking at the TeV scale. Via a reorganization of the perturbative series, values of the cosmological constant are generically reconcilable with supersymmetry breaking scenarios having ...
متن کاملIssues in Dynamical Supersymmetry Breaking
Recent work has made clear that we have far more control over the dynamics of supersymmetric than non-supersymmetric theories. Here, I discuss some issues in dynamical supersymmetry breaking both in ordinary eld theory and in string theory. In string theory, in particular, it is possible to show, in some circumstances, that stringy non-perturbative eeects are smaller than eeects visible in the ...
متن کاملLocal string models of soft supersymmetry breaking
We study soft supersymmetry breaking in local models of type II string theory compactifications with branes and fluxes. In such models, magnetic fluxes can be treated as auxiliary fields in N = 2 SUSY multiplets. These multiplets appear as “spurion superfields” in the low-energy effective action for the local model. We discuss the pattern of SUSY breaking from N = 2 to N = 1 to N = 0 in these m...
متن کامل