Dilatonic Inflation and SUSY Breaking in String-inspired Supergravity

Details Dilatonic Inflation and SUSY Breaking in String-inspired Supergravity Dilatonic Inflation and SUSY Breaking in String-inspired Supergravity

2003-03-05

arxiv.org/abs/hep-ph/0303029v3

Mod.Phys.Lett. A18 (2003) 2785-2794

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 eps figures. Typos and references corrected. Final version to appear in Mod. Phys. Lett. A

Scientific paper

10.1142/S0217732303012465

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 eta-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 \sim 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.

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