Antoniadis, Ignatios; Chatrabhuti, A.; Isono, H.; Knoops, R. (2017). Inflation from supersymmetry breaking. European physical journal. C - particles and fields, 77(11), p. 724. EDP Sciences 10.1140/epjc/s10052-017-5302-y
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We explore the possibility that inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. More- over, we impose an R-symmetry that allows one to satisfy easily the slow-roll conditions, avoiding the so-called η- problem, and leads to two different classes of small-field inflation models; they are characterised by an inflationary plateau around the maximum of the scalar potential, where R-symmetry is either restored or spontaneously broken, with the inflaton rolling down to a minimum describing the present phase of our Universe. To avoid the Goldstone boson and be left with a single (real) scalar field (the inflaton), R- symmetry is gauged with the corresponding gauge boson becoming massive. This framework generalises a model stud- ied recently by the present authors, with the inflaton iden- tified by the string dilaton and R-symmetry together with supersymmetry restored at weak coupling, at infinity of the dilaton potential. The presence of the D-term allows a tuning of the vacuum energy at the minimum. The proposed models agree with cosmological observations and predict a tensor- to-scalar ratio of primordial perturbations 10⁻⁹ ≲ r ≲ 10⁻⁴ and an inflation scale 10¹⁰ GeV ≲ H∗ ≲ 10¹² GeV. H∗ may be lowered up to electroweak energies only at the expense of fine-tuning the scalar potential.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Antoniadis, Ignatios |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
13 Dec 2017 13:56 |
Last Modified: |
05 Dec 2022 15:08 |
Publisher DOI: |
10.1140/epjc/s10052-017-5302-y |
ArXiv ID: |
1706.04133 |
BORIS DOI: |
10.7892/boris.107086 |
URI: |
https://boris.unibe.ch/id/eprint/107086 |
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