Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2013/04/020
Keywords
alternatives to inflation; non-gaussianity; cosmological perturbation theory
Funding
- NASA ATP grant [NNX11AI95G]
- Alfred P. Sloan Foundation
- NSF [PHY-1145525]
- NASA [143925, NNX11AI95G] Funding Source: Federal RePORTER
- Direct For Mathematical & Physical Scien
- Division Of Physics [1001296, 1145525] Funding Source: National Science Foundation
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We systematically derive the consistency relations associated to the non-linearly realized symmetries of theories with spontaneously broken conformal symmetry but with a linearly-realized de Sitter subalgebra. These identities relate (N + 1)-point correlation functions with a soft external Goldstone to N-point functions. These relations have direct implications for the recently proposed conformal mechanism for generating density perturbations in the early universe. We study the observational consequences, in particular a novel one-loop contribution to the four-point function, relevant for the stochastic scale-dependent bias and CMB mu-distortion.
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