Dilatonic Inflation and SUSY Breaking in String-Inspired Supergravity
Abstract
The theory of inflation will be investigated as well as supersymmetry breaking in the context of supergravity, incorporating the target-space duality and the nonperturbative gaugino condensation in the hidden sector. We found an inflationary trajectory of a dilaton field and a condensate field which breaks supersymmetry at once. The model satisfies the slow-roll condition which solves the η-problem. When the particle rolls down along the minimized trajectory of the potential V(S,Y) at a duality invariant point of T=1, we can obtain the e-fold value ~57. And then the cosmological parameters obtained from our model well match the recent WMAP data combined with other experiments. This observation suggests one to consider the string-inspired supergravity as a fundamental theory of the evolution of the universe as well as the particle theory.
- Publication:
-
Modern Physics Letters A
- Pub Date:
- 2003
- DOI:
- 10.1142/S0217732303012465
- arXiv:
- arXiv:hep-ph/0303029
- Bibcode:
- 2003MPLA...18.2785H
- Keywords:
-
- 04.65.+e;
- 11.25.Mj;
- 11.30.Pb;
- 12.60.Jv;
- Supergravity;
- Compactification and four-dimensional models;
- Supersymmetry;
- Supersymmetric models;
- High Energy Physics - Phenomenology
- E-Print:
- 10 pages, 4 eps figures. Typos and references corrected. Final version to appear in Mod. Phys. Lett. A