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Title: Relations between canonical and non-canonical inflation

We look for potential observational degeneracies between canonical and non-canonical models of inflation of a single field φ. Non-canonical inflationary models are characterized by higher than linear powers of the standard kinetic term X in the effective Lagrangian p(X,φ) 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.
Authors:
 [1] ;  [2] ;  [3]
  1. AEI Max-Planck-Institut für Gravitationsphysik, Am Mühlenberg 1, D-14476 Potsdam (Germany)
  2. II. Institut für Theoretische Physik der Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg (Germany)
  3. Deutsches Elektronen-Synchrotron DESY, Theory Group, Luruper Chaussee 149, D-22603 Hamburg (Germany)
Publication Date:
OSTI Identifier:
22369879
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 12; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BORN-INFELD THEORY; LAGRANGIAN FUNCTION; POTENTIALS; STRING MODELS; STRING THEORY COSMOLOGICAL INFLATION