Challenges in Supersymmetric Cosmology

Antoniadis, Ignatios; Chatrabhuti, Auttakit (2020). Challenges in Supersymmetric Cosmology. Symmetry, 12(3), p. 468. MDPI 10.3390/sym12030468

[img]
Preview
Text
10.3390_sym12030468.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (935kB) | Preview

We discuss the possibility that inflation is driven by supersymmetry breaking with the scalar component of the goldstino superfield (sgoldstino) playing the role of the inflaton and charged under a gauged U(1) R-symmetry. Imposing a linear superpotential allows us to satisfy easily the slow-roll conditions, avoiding the so-called η-problem, and leads to an interesting class of small field inflation models, characterised by an inflationary plateau around the maximum of the scalar potential near the origin, where R-symmetry is restored with the inflaton rolling down to a minimum describing the present phase of the Universe. Inflation can be driven by either an F- or a D-term, while the minimum has a positive tuneable vacuum energy. The models agree with cosmological observations and in the simplest case predict a rather small tensor-to-scalar ratio of primordial perturbations. We propose a generalisation of Fayet-Iliopoulos model as a microscopic model leading to this class of inflation models at low energy.

Item Type:

Journal Article (Original Article)

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:

2073-8994

Publisher:

MDPI

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

17 Jun 2020 10:49

Last Modified:

17 Jun 2020 10:49

Publisher DOI:

10.3390/sym12030468

BORIS DOI:

10.7892/boris.144709

URI:

https://boris.unibe.ch/id/eprint/144709

Actions (login required)

Edit item Edit item
Provide Feedback