Supergravity, M theory and Cosmology
arXiv:hep-th/0205315
Abstract
We discuss some recent attempts to reconcile cosmology with supergravity and M/string theory. First of all, we point out that in extended supergravities the scalar masses are quantized in terms of the cosmological constant in de Sitter vacua: the eigenvalues of the Casimir operator 3 m^2/Λtake integer values. For the current value of the cosmological constant extended supergravities predict ultra light scalars with the mass of the order of Hubble constant, 10^{-33} eV. This may have interesting consequences for cosmology. Turning our attention to cosmological implications of M/string theory, we present a possibility to use string theory D-brane constructions to reproduce the main features of hybrid inflation. We stress an important role played by Fayet-Iliopoulos terms responsible for the positive contribution to the potentials and stabilization of moduli.
24 pages, a talk at Stephen Hawking's 60th birthday conference, Cambridge University, Jan. 2002
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Cited by in corpus (8)
- Brane-World Gravity
- Supergravity, Dark Energy and the Fate of the Universe
- M-theory, Cosmological Constant and Anthropic Principle
- The R-map and the Coupling of N=2 Tensor Multiplets in 5 and 4 Dimensions
- Stable de Sitter vacua in N=2, D=5 supergravity
- The de Sitter group and its representations: a window on the notion of de Sitterian elementary systems
- Features of deSitter Vacua in M-Theory
- N=2 Gauged Supergravity with Stable dS Vacuum and Masses of Ultra-Light Scalars in Einstein Field Equations