Minimal Supergravity Models of Inflation

By Sergio Ferrara, R. Kallosh, Andrei Linde, M. Porrati. 2013

439 citations recorded by the source corpus.

We present a superconformal master action for a class of supergravity models with one arbitrary function defining the Jordan frame. It leads to a gauge-invariant action for a real vector multiplet, which upon gauge fixing describes a massive vector multiplet, or to a dual formulation with a linear multiplet and a massive tensor field. In both cases the models have one real scalar, the inflaton, naturally suited for single-field inflation. Vectors and tensors required by supersymmetry to complement a single real scalar do not acquire vacuum expectation values during inflation, so there is no need to stabilize the extra scalars that are always present in the theories with chiral matter multiplets. The new class of models can describe any inflaton potential that vanishes at its minimum and grows monotonically away from the minimum. In this class of supergravity models, one can fit any desirable choice of inflationary parameters ns and r.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/49d5d6fcb9c2c6027ccc184c5564885b50f14689

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Citations in the corpus

Higgs Inflation (2018, background): “At large |a|N∗, these predictions display an interesting attractor behavior, very similar to that appearing in α-attractor scenarios [118–120] (see also Ref.”
Large field inflation and double α-attractors (2014, methodology): “For small α the cosmological predictions of this model were studied in [19] and in [17].”
Multi-field conformal cosmological attractors (2013, result): “Recently another set of models with similar predictions was identified in [17–22], and some earlier works in the related area, such as [24,25], have been rediscovered and reinforced [6,19,21,23].”
Primordial black holes from α-attractors (2018, background): “Note that the Kähler metric on the S = 0 scalar submanifold corresponds to a Σ = SU(1, 1)/U(1) coset symmetric space of constant curvature RΣ = −2/3α and therefore, one may recognize α as the square of the “radius” of Σ [45, 52, 53].”
Superconformal inflationary α-attractors (2013, methodology): “4) [5], which can be represented as V = V0 ( 1− e− √ 2 3α φ )2 (2.”
Inflationary Cosmology after Planck 2013 (2014, methodology): “The same potential can be also obtained in supergravity with vector or tensor multiplets [96].”
On sgoldstino-less supergravity models of inflation (2014, background): “10) considered in [6, 30] is”