Field Evolution leading to hybrid inflation

Details Field Evolution leading to hybrid inflation Field Evolution leading to hybrid inflation

1998-03-31

arxiv.org/abs/hep-ph/9803498v1

Phys.Lett.B431:286-294,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 9 pages, 3 figures

Scientific paper

10.1016/S0370-2693(98)00611-X

In general the onset of hybrid inflation requires an extremely homogeneous field configuration at the end of Planck era. The field \phi orthogonal to the inflaton \sigma must be zero with high accuracy over the range exceeding the initial horizon size \sim m_{Pl}^{-1} by about two orders of magnitude. We consider a supersymmetric model that permits the decay of the oscillating field \phi into light particles. We study the field evolution and find that the requirement of the extreme homogeneity can be relaxed. However, the field \phi must still be smaller than the inflaton by a factor of order 1 over a region far exceeding the initial horizon size.

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