Challenges in generating density perturbations from a fluctuating inflaton coupling

Enqvist, Kari and Mazumdar, Anupam and Postma, Marieke (2003) Challenges in generating density perturbations from a fluctuating inflaton coupling. Physical Review D, 67 (12). ISSN 1550-7998

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Abstract

We discuss the possibility of generating adiabatic density perturbations from spatial fluctuations in the inflaton decay rate which are due to quantum fluctuations of light moduli fields coupling to the inflaton. We point out that non-renormalizable operators, which lift the flatness of the moduli potential, play an important role for the density perturbations. In particular, the non-renormalizable terms give rise to a considerable damping of the fluctuations and thereby pose an obstruction to the construction of possible models.

Item Type: Journal Article
Journal or Publication Title: Physical Review D
Additional Information: © 2003 The American Physical Society 3 pages
Departments: Faculty of Science and Technology > Physics
ID Code: 63492
Deposited By: ep_importer_pure
Deposited On: 02 May 2013 09:46
Refereed?: Yes
Published?: Published
Last Modified: 24 Jun 2019 00:36
URI: https://eprints.lancs.ac.uk/id/eprint/63492

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