Simple sinflaton-less α-attractors

Renata Kallosh, Yusuke Yamada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We construct the simplest inflationary α-attractor models in supergravity: it has only one scalar, the inflaton. There is no sinflaton since the inflaton belongs to an orthogonal nilpotent superfield where the sinflaton depends on fermion bilinears. When the local supersymmetry is gauge-fixed, these models have only one single real scalar (the inflaton), a graviton and a massive gravitino. The sinflaton, sgoldstino and inflatino are all absent from the physical spectrum in the unitary gauge. The orthogonality condition leads to the simplest Kähler potential for the inflaton, while preserving the Poincaré disk geometry of α-attractors. The models are particularly simple in the framework of the D3 ¯ induced geometric inflation.

Original languageEnglish
Article number139
JournalJournal of High Energy Physics
Volume2019
Issue number3
DOIs
Publication statusPublished - 2019 Mar 1
Externally publishedYes

Keywords

  • Cosmology of Theories beyond the SM
  • Supergravity Models
  • Supersymmetric Effective Theories

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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