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Challenges in supersymmetric cosmology

Abstract : We discuss the possibility that 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 $\eta$-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.
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Submitted on : Tuesday, September 8, 2020 - 11:10:47 PM
Last modification on : Tuesday, September 22, 2020 - 11:20:33 PM

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Ignatios Antoniadis, Auttakit Chatrabhuti. Challenges in supersymmetric cosmology. 19th Hellenic School and Workshops on Elementary Particle Physics and Gravity, Aug 2019, Corfu, Greece. pp.081, ⟨10.22323/1.376.0081⟩. ⟨hal-02934058⟩

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