Inflation from supergravity with gauged R-symmetry in de Sitter vacuum

Antoniadis, Ignatios; Chatrabhuti, Auttakit; Isono, Hiroshi; Knoops, Rob

doi:10.1140/epjc/s10052-016-4539-1

Cited by 26 publications

(64 citation statements)

References 45 publications

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“…It was shown in [12,39] that this model is anomaly-free. By choosing, a = 2.34422 × 10 −6 , b = −0.0234, c = 7.10 × 10 −6 , ξ = 0.3023, α = −0.7813, we obtain an appropriate inflationary potential with a flat plateau around the maximum φ 0 ≈ 66.37 illustrated in Fig.…”

Section: Examplementioning

confidence: 94%

“…The latter corresponds actually to a generalisation of the model we studied recently [12], inspired by string theory [11]. It has the same field content but in a different field basis with a chiral multiplet S ∝ ln X playing the role of the string dilaton.…”

Section: Introductionmentioning

confidence: 94%

“…On the other hand, in the second case inflation will start at a generic point X = 0. In order to make easier contact with previous literature [11,12], it is convenient to work with another chiral superfield S, which is invariant under a shift symmetry…”

Section: Symmetric Versus Non-symmetric Pointmentioning

confidence: 99%

“…In order to give an example of this class of models, let us consider the case γ = 1, β = 0, with Kähler potential [12] …”

Section: Examplementioning

confidence: 99%

“…Moreover, it allows for the presence of a realistic minimum describing our present Universe with an infinitesimal positive vacuum energy arising due to a cancellation between an F-and D-term contribu-tions to the scalar potential, without affecting the properties of the inflationary plateau, along the lines of Refs. [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Inflation from supersymmetry breaking

et al. 2017

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We explore the possibility that inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. Moreover, we impose an R-symmetry that allows one 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 characterised 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. To avoid the Goldstone boson and be left with a single (real) scalar field (the inflaton), Rsymmetry is gauged with the corresponding gauge boson becoming massive. This framework generalises a model studied recently by the present authors, with the inflaton identified by the string dilaton and R-symmetry together with supersymmetry restored at weak coupling, at infinity of the dilaton potential. The presence of the D-term allows a tuning of the vacuum energy at the minimum. The proposed models agree with cosmological observations and predict a tensorto-scalar ratio of primordial perturbations 10 −9 < ∼ r < ∼ 10 −4

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Section: Examplementioning

confidence: 94%

Section: Introductionmentioning

confidence: 94%

Section: Symmetric Versus Non-symmetric Pointmentioning

confidence: 99%

“…In order to give an example of this class of models, let us consider the case γ = 1, β = 0, with Kähler potential [12] …”

Section: Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inflation from supersymmetry breaking

et al. 2017

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Challenges in Particle Physics and Cosmology

Antoniadis,

Chatrabhuti

2024

Springer Proceedings in Physics

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The Supersymmetric Effective Field Theory of Inflation

Delacrétaz

Gorbenko

Senatore

2017

J. High Energ. Phys.

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We construct the Supersymmetric Effective Field Theory of Inflation, that is the most general theory of inflationary fluctuations when time-translations and supersymmetry are spontaneously broken. The non-linear realization of these invariances allows us to define a complete SUGRA multiplet containing the graviton, the gravitino, the Goldstone of time translations and the Goldstino, with no auxiliary fields. Going to a unitary gauge where only the graviton and the gravitino are present, we write the most general Lagrangian built out of the fluctuations of these fields, invariant under time-dependent spatial diffeomorphisms, but softly-breaking time diffeomorphisms and gauged SUSY. With a suitable Stückelberg transformation, we introduce the Goldstone boson of time translation and the Goldstino of SUSY. No additional dynamical light field is needed. In the high energy limit, larger than the inflationary Hubble scale for the Goldstino, these fields decouple from the graviton and the gravitino, greatly simplifying the analysis in this regime. We study the phenomenology of this Lagrangian. The Goldstino can have a non-relativistic dispersion relation. Gravitino and Goldstino affect the primordial curvature perturbations at loop level. The UV modes running in the loops generate three-point functions which are degenerate with the ones coming from operators already present in the absence of supersymmetry. Their size is potentially as large as corresponding to f equil., orthog. NL ∼ 1 or, for particular operators, even 1. The non-degenerate contribution from modes of order H is estimated to be very small.

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Inflation from supergravity with gauged R-symmetry in de Sitter vacuum

Cited by 26 publications

References 45 publications

Inflation from supersymmetry breaking

Inflation from supersymmetry breaking

Challenges in Particle Physics and Cosmology

The Supersymmetric Effective Field Theory of Inflation

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