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Kunio Kaneta
순수물리이론 연구단
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Very low scale Coleman-Weinberg inflation with nonminimal coupling

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Title
Very low scale Coleman-Weinberg inflation with nonminimal coupling
Author(s)
Kunio Kaneta; Osamu Seto; Ryo Takahashi
Publication Date
2018-03
Journal
PHYSICAL REVIEW D, v.97, no.6, pp.063004 -
Publisher
American Physical Society
Abstract
We study viable small-field Coleman-Weinberg (CW) inflation models with the help of nonminimal coupling to gravity. The simplest small-field CW inflation model (with a low-scale potential minimum) is incompatible with the cosmological constraint on the scalar spectral index. However, there are possibilities to make the model realistic. First, we revisit the CW inflation model supplemented with a linear potential term. We next consider the CW inflation model with a logarithmic nonminimal coupling and illustrate that the model can open a new viable parameter space that includes the model with a linear potential term. We also show parameter spaces where the Hubble scale during the inflation can be as small as 10-4 GeV, 1 GeV, 104 GeV, and 108 GeV for the number of e-folds of 40, 45, 50, and 55, respectively, with other cosmological constraints being satisfied. © 2018 authors. Published by the American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/4638
DOI
10.1103/PhysRevD.97.063004
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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