Growth of inflaton perturbations and the post-inflation era in supersymmetric hybrid inflation models

McDonald, John (2003) Growth of inflaton perturbations and the post-inflation era in supersymmetric hybrid inflation models. Physical Review D, 68 (8). 083502. ISSN 1550-7998

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Abstract

It has been shown that hybrid inflation may end with the formation of non-topological solitons of the inflaton field. As a first step towards a fully realistic picture of the post-inflation era and reheating in supersymmetric hybrid inflation models, we study the classical scalar field equations of a supersymmetric hybrid inflation model using a semianalytical ansatz for the spatial dependence of the fields. Using the minimal D-term inflation model as an example, the inflaton field is evolved using the full 1-loop effective potential from the slow-rolling era to the U(1)FI symmetry-breaking phase transition. Spatial perturbations of the inflaton corresponding to quantum fluctuations are introduced for the case where there is spatially coherent U(1)FI symmetry breaking. The maximal growth of the dominant perturbation is found to depend only on the ratio of superpotential coupling λ to the gauge coupling g. The inflaton condensate fragments to non-topological solitons for λ/g≳0.09. The possible consequences of nontopological soliton formation in fully realistic supersymmetric hybrid inflation models are discussed.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
63116
Deposited By:
Deposited On:
25 Mar 2013 13:48
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 03:47