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Challenges in Supersymmetric Cosmology

by 1,2,*,† and 3,†
Laboratoire de Physique Théorique et Hautes Energies - LPTHE, Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
Department of Physics, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Symmetry 2020, 12(3), 468;
Received: 13 February 2020 / Revised: 27 February 2020 / Accepted: 6 March 2020 / Published: 16 March 2020
(This article belongs to the Special Issue Selected Papers: 10th Mathematical Physics Meeting)
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. View Full-Text
Keywords: supersymmetry; supergravity; inflation supersymmetry; supergravity; inflation
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MDPI and ACS Style

Antoniadis, I.; Chatrabhuti, A. Challenges in Supersymmetric Cosmology. Symmetry 2020, 12, 468.

AMA Style

Antoniadis I, Chatrabhuti A. Challenges in Supersymmetric Cosmology. Symmetry. 2020; 12(3):468.

Chicago/Turabian Style

Antoniadis, Ignatios, and Auttakit Chatrabhuti. 2020. "Challenges in Supersymmetric Cosmology" Symmetry 12, no. 3: 468.

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