New inflation in supergravity with a chaotic initial condition

Details New inflation in supergravity with a chaotic initial condition New inflation in supergravity with a chaotic initial condition

2000-07-04

arxiv.org/abs/hep-ph/0007021v2

Phys.Rev. D63 (2001) 043506

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.63.043506

We propose a self-consistent scenario of new inflation in supergravity. Chaotic inflation first takes place around the Planck scale, which solves the longevity problem, namely, why the universe can live much beyond the Planck time, and also gives an adequate initial condition for new inflation. Then, new inflation lasts long enough to generate primordial fluctuations for the large scale structure, which generally has a tilted spectrum with the spectral index $n_{s} < 1$. The successive decay of the inflaton leads to the reheating temperature low enough to avoid the overproduction of gravitinos in a wide range of the gravitino mass.

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