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Journal Articles Journal of Cosmology and Astroparticle Physics Year : 2014

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

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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.

Dates and versions

cea-01073608 , version 1 (10-10-2014)

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Paolo Creminelli, Jérôme Gleyzes, Lam Hui, Marko Simonović, Filippo Vernizzi. Single-Field Consistency Relations of Large Scale Structure. Part III: Test of the Equivalence Principle. Journal of Cosmology and Astroparticle Physics, 2014, 14 (06), pp.009. ⟨10.1088/1475-7516/2014/06/009⟩. ⟨cea-01073608⟩
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