Volume 102, Number 5, June 2013
|Number of page(s)||5|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||11 June 2013|
A single field inflation model with large local non-Gaussianity
1 Centre for Theoretical Cosmology, DAMTP, University of Cambridge - Cambridge CB3 0WA, UK, EU
2 School of Astronomy, Institute for Research in Fundamental Sciences (IPM) - P. O. Box 19395-5531, Tehran, Iran
3 School of Physics, Institute for Research in Fundamental Sciences (IPM) - P. O. Box 19395-5531, Tehran, Iran
4 Yukawa Institute for Theoretical Physics, Kyoto University - Kyoto 606-8502, Japan
Received: 12 April 2013
Accepted: 22 May 2013
The detection of a large local form of non-Gaussianity is considered to be able to rule out all single field inflation models. This statement is based on the single field consistency condition. Despite the awareness of some implicit assumptions in the derivation of this condition and the demonstration of corresponding examples that illustrate these caveats, to date there is still no explicit and self-consistent model which can serve as a counterexample to this statement. We present such a model in this letter.
PACS: 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)
© EPLA, 2013
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