Consistency Relations for the Conformal Mechanism
arXiv:1212.3329 · doi:10.1088/1475-7516/2013/04/020
Abstract
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.
34 pages, 3 figures. v2: minor changes, version appearing in JCAP
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