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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Int.J.Mod.Phys.A, 2018, 33 (31), pp.1844021. 〈10.1142/S0217751X18440219〉
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Soumis le : mercredi 5 décembre 2018 - 11:05:46
Dernière modification le : mercredi 12 décembre 2018 - 01:36:11

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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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