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arXiv · 1312.6074

Single-Field Consistency Relations of Large Scale Structure. Part III: Test of the Equivalence Principle

Paolo Creminelli·Jérôme Gleyzes·Lam Hui·Marko Simonović·Filippo Vernizzi
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Abstract

The recently derived consistency relations for Large Scale Structure do not hold if the Equivalence Principle (EP) is violated. We show it explicitly in a toy model with two fluids, one of which is coupled to a fifth force. We explore the constraints that galaxy surveys can set on EP violation looking at the squeezed limit of the 3-point function involving two populations of objects. We find that one can explore EP violations of order 10^{-3} - 10^{-4} on cosmological scales. Chameleon models are already very constrained by the requirement of screening within the Solar System and only a very tiny region of the parameter space can be explored with this method. We show that no violation of the consistency relations is expected in Galileon models.

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Paolo Creminelli, Jérôme Gleyzes, Lam Hui, Marko Simonović, Filippo Vernizzi. 2014-07-15. Single-Field Consistency Relations of Large Scale Structure. Part III: Test of the Equivalence Principle. https://doi.org/10.1088/1475-7516%2F2014%2F06%2F009

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