Inflation from supersymmetry breaking
- Antoniadis, Ignatios Albert Einstein Center, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
- 2018-11-20
Published in:
- International Journal of Modern Physics A. - World Scientific Pub Co Pte Lt. - 2018, vol. 33, no. 31, p. 1844021
English
I discuss a general class of models where the inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. Imposing an R-symmetry allows to satisfy easily the slow-roll conditions, avoiding the so-called [Formula: see text]-problem, and leads to two different classes of small field inflation models; they are characterized 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. Inflation can be driven by either an F- or a D-term, while the minimum has a positive tunable vacuum energy. The models agree with cosmological observations and in the simplest case predict a tensor-to-scalar ratio of primordial perturbations [Formula: see text] and an inflation scale [Formula: see text].
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1142/s0217751x18440219
- ISSN 0217-751X
- Persistent URL
- https://sonar.ch/global/documents/41628
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