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Flat direction dynamics in a non-topological soliton-dominated universe.

McDonald, John (2004) Flat direction dynamics in a non-topological soliton-dominated universe. Journal of Cosmology and Astroparticle Physics, 2004 (8). 002. ISSN 1475-7516

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Abstract

In running mass inflation and hybrid inflation models it is possible that the inflaton field will fragment into non-topological solitons, resulting in a highly inhomogeneous post-inflation era prior to reheating. In supersymmetric models with a conventional homogeneous post-inflation era, the dynamics of flat direction scalars are determined by cH2 corrections to the mass squared terms (where ), coming from F-terms in the early universe combined with Planck-scale suppressed interactions. Here we reconsider the mass squared corrections for a universe dominated by inflatonic non-topological solitons. We show that in this case the dynamics of a coherently oscillating flat direction scalar are typically the same as for the case where there is no significant mass squared correction, even in the vicinity of the non-topological solitons. Therefore the dynamics of flat direction scalars in a universe dominated by inflatonic non-topological solitons are equivalent to the case c = 0 of a homogeneous universe.

Item Type: Article
Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords: cosmology of theories beyond the SM ; physics of the early universe
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23935
Deposited By: ep_ss_importer
Deposited On: 24 Feb 2009 13:20
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:18
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23935

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