Galileon inflation

By C. Burrage, Claudia de Rham, D. Seery, A. Tolley. 2010

263 citations recorded by the source corpus.

Galileon inflation is a radiatively stable higher derivative model of inflation. The model is determined by a finite number of relevant operators which are protected by a covariant generalization of the Galileon shift symmetry. We show that the nongaussianity of the primordial density perturbation generated during an epoch of Galileon inflation is a particularly powerful observational probe of these models and that, when the speed of sound is small, f NL can be larger than the usual result f NL ∝ c − 2 s .

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2aa0b7f20e153fc88154632b1631c0e502c50e07

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. D. Baumann
2. D. Green
3. A. Banday
4. Xingang Chen
5. H. Eriksen
6. I. Sawicki
7. E. Pajer
8. F. Hansen

In Nuclear and High Energy Physics

1. D. Baumann
2. D. Green
3. I. Sawicki
4. Liam McAllister
5. Kurt Hinterbichler
6. Xingang Chen
7. A. Vikman
8. M. Trodden

Citations in the corpus

• Planck 2018 results. IX. Constraints on primordial non-Gaussianity (2019, background): “Different higher-derivative interactions of the inflaton field characterize, ghost inflation (Arkani-Hamed et al. 2004) or models of inflation based on Galileon symmetry (e.g., Burrage et al. 2011).”
• The imperfect fluid behind kinetic gravity braiding (2011, background): “Nonetheless, these theories have been named galileon theories and a significant body of work has already been carried out analysing their impact not only on cosmological solutions [28–44], but also in other circumstances [45–52].”
• Symmetries for Galileons and DBI scalars on curved space (2011, background): “Much has been revealed about the Galileon terms, including such useful properties as a non-renormalization theorem [2, 5, 6], and applications in cosmology [6–14].”
• Inflation and String Theory (2014, background): “29 Another class of ghost-free, radiatively stable higher-derivative models is Galileon inflation [266].”
• Equilateral Non-Gaussianity and New Physics on the Horizon (2011, background): “In galileon inflation [13] the theory is protected by spacetime translation invariance.”
• Signature of supersymmetry from the early universe (2011, background): “Higher derivatives lead to interesting theories such as ghost inflation [31] and galileon inflation [32].”