2007

On the consistency relation of the 3-point function in single field inflation

Cheung, Clifford, Fitzpatrick, A. Liam, Kaplan, Jared et al.

Understand

The consistency relation for the 3-point function of the CMB is a very powerful observational signature which is believed to be true for every inflationary model in which there is only one dynamical degree of freedom.

Its importance relies on the fact that deviations from it might be detected in next generation experiments, allowing us to rule out all single field inflationary models.
After making more precise the already existing proof of the consistency relation, we use a recently developed effective field theory for inflationary perturbations to provide an alternative and very explicit proof valid at leading non trivial order in slow roll parameters.

Built on

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Similar

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D. N. Spergel
Cited in the paper.
C. Cheung, P. Creminelli, L. Fitzpatrick, J. Kaplan and L. Senatore “The Effective Field Theory of Inflation,” arXiv:0709.0293 [hep-th]
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D. H. Lyth and D. Seery, “Classicality of the primordial perturbations,” astro-ph/0607647
Cited in the paper.

Then

P. Creminelli, M. A. Luty, A. Nicolis and L. Senatore, “Starting the universe: Stable violation of the null energy condition and non-standard cosmologies,” JHEP
2006
Later among the works it cites.
X. Chen, M. x. Huang, S. Kachru and G. Shiu, “Observational signatures and non-Gaussianities of general single field inflation,” JCAP
2007
Closest in time.
J. L. Lehners, P. McFadden, N. Turok and P. J. Steinhardt, “Generating ekpyrotic curvature perturbations before the big bang,” Phys. Rev. D
2007
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E. I. Buchbinder, J. Khoury and B. A. Ovrut, “New Ekpyrotic Cosmology,” Phys. Rev. D
2007
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P. Creminelli and L. Senatore, “A smooth bouncing cosmology with scale invariant spectrum,” JCAP
2007
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P. Creminelli, L. Senatore, M. Zaldarriaga and M. Tegmark, “Limits on
2007
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P. Creminelli, L. Senatore and M. Zaldarriaga, “Estimators for local non-Gaussianities,” JCAP
2007
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