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  Relations between canonical and non-canonical inflation

Gwyn, R., Rummel, M., & Westphal, A. (2013). Relations between canonical and non-canonical inflation. Journal of Cosmology and Astroparticles Physics, (12): 010. doi:10.1088/1475-7516/2013/12/010.

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1212.4135 (Preprint), 2MB
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 Creators:
Gwyn, Rhiannon1, Author           
Rummel, Markus, Author
Westphal, Alexander, Author
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24014              

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Free keywords: High Energy Physics - Theory, hep-th,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: We look for potential observational degeneracies between canonical and non-canonical models of inflation of a single field $\phi$. Non-canonical inflationary models are characterized by higher than linear powers of the standard kinetic term $X$ in the effective Lagrangian $p(X,\phi)$ and arise for instance in the context of the Dirac-Born-Infeld (DBI) action in string theory. An on-shell transformation is introduced that transforms non-canonical inflationary theories to theories with a canonical kinetic term. The 2-point function observables of the original non-canonical theory and its canonical transform are found to match in the case of DBI inflation.

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 Dates: 2012-12-172013
 Publication Status: Issued
 Pages: LaTeX, 1 + 29 pages, 7 figures
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Title: Journal of Cosmology and Astroparticles Physics
  Other : J. Cosmol. Astropart. Phys.
Source Genre: Journal
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Publ. Info: Bristol, England : Institute of Physics Pub.
Pages: - Volume / Issue: (12) Sequence Number: 010 Start / End Page: - Identifier: ISSN: 1475-7516
CoNE: https://pure.mpg.de/cone/journals/resource/111055183238000