Determining the regimes of cold and warm inflation in the susy hybrid model

Details Determining the regimes of cold and warm inflation in the susy hybrid model Determining the regimes of cold and warm inflation in the susy hybrid model

2004-11-10

arxiv.org/abs/hep-ph/0411144v2

Phys.Rev. D71 (2005) 063515

Physics

High Energy Physics

High Energy Physics - Phenomenology

paragraph added at the end of section V; references added; accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.71.063515

The SUSY hybrid inflation model is found to dissipate radiation during the inflationary period. Analysis is made of parameter regimes in which these dissipative effects are significant. The scalar spectral index, its running, and the tensor-scalar ratio are computed in the entire parameter range of the model. A clear prediction for strong dissipative warm inflation is found for n_S-1 \simeq 0.98 and a low tensor-scalar ratio much below 10^{-6}. The strong dissipative warm inflation regime also is found to have no \eta-problem and with the field amplitude much below the Planck scale. As will be discussed, this has important theoretical implications in permitting a much wider variety of SUGRA extensions to the basic model.

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