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Kenji Kadota
순수물리이론 연구단
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A viable D-term hybrid inflation model

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Title
A viable D-term hybrid inflation model
Author(s)
Kenji Kadota; Tatsuo Kobayashi; Keigo Sumita
Publication Date
2017-11
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v.2017, no.11, pp.033 -
Publisher
IOP PUBLISHING LTD
Abstract
We propose a new model of the D-term hybrid inflation in the framework of supergravity. Although our model introduces, analogously to the conventional D-term inflation, the inflaton and a pair of scalar fields charged under a U(1) gauge symmetry, we study the logarithmic and exponential dependence on the inflaton field, respectively, for the Kähler and superpotential. This results in a characteristic one-loop scalar potential consisting of linear and exponential terms, which realizes the small-field inflation dominated by the Fayet-Iliopoulos term. With the reasonable values for the coupling coefficients and, in particular, with the U(1) gauge coupling constant comparable to that of the Standard Model, our D-term inflation model can solve the notorious problems in the conventional D-term inflation, namely, the CMB constraints on the spectral index and the generation of cosmic strings. © 2017 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/4403
ISSN
1475-7516
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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