Inflation from supersymmetry breaking

Abstract : 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 η-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 10−9 ≲ r ≲ 10−4 and an inflation scale 1010GeV ≲ H ∗≲ 1012GeV.
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Submitted on : Wednesday, December 5, 2018 - 11:05:46 AM
Last modification on : Wednesday, April 17, 2019 - 3:30:52 PM

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Ignatios Antoniadis. Inflation from supersymmetry breaking. Int.J.Mod.Phys.A, 2018, 33 (31), pp.1844021. ⟨10.1142/S0217751X18440219⟩. ⟨hal-01945225⟩



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