Assisted Chaotic Inflation in Higher Dimensional Theories

Details Assisted Chaotic Inflation in Higher Dimensional Theories Assisted Chaotic Inflation in Higher Dimensional Theories

1999-06-11

arxiv.org/abs/hep-ph/9906331v1

Phys.Lett.B464:192-198,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, LaTeX file

Scientific paper

10.1016/S0370-2693(99)00982-X

We address the problem of the large initial field values in chaotic inflation and propose a remedy in the framework of the so-called assisted inflation. We demonstrate that a 4-dimensional theory of multiple, scalar fields with initial field values considerably below the Planck scale, can give rise to inflation even though none of the individual scalar fields are capable of driving inflation. The problems arising from the presence of possible non-renormalizable interactions is therefore removed. As a concrete example of a theory with multiple scalar fields, we consider a (4+d)-dimensional field theory of a single, non-interacting massive scalar field whose KK modes play the role of the assisted sector. For the KK modes to assist inflation, the extra dimensions must have a size larger than the inverse (4D) Planck scale.

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