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Enlarging the space of viable inflation models: A slingshot mechanism

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Title
Enlarging the space of viable inflation models: A slingshot mechanism
Author(s)
Keith R. Dienes; Jeff Kost; Brooks Thomas
Publication Date
2019-10
Journal
PHYSICAL REVIEW D, v.100, no.8, pp.083516 - 1
Publisher
AMER PHYSICAL SOC
Abstract
The viability of a given model for inflation is determined not only by the form of the inflaton potential, but also by the initial inflaton field configuration. In many models, field configurations which are otherwise well-motivated nevertheless fail to induce inflation, or fail to produce an inflationary epoch of duration sufficient to solve the horizon and flatness problems. In this paper, we propose a mechanism which enables inflation to occur even with such initial conditions. Our mechanism involves multiple scalar fields which experience a time-dependent mixing. This in turn leads to a "re-overdamping" phase as well as a parametric resonance which together "slingshot" the inflaton field from regions of parameter space that do not induce inflation to regions that do. Our mechanism is flexible, dynamical, and capable of yielding an inflationary epoch of sufficiently long duration. This slingshot mechanism can therefore be utilized in a variety of settings and thereby enlarge the space of potentially viable inflation models C.Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6840
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
Files in This Item:
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