期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/06/009
关键词
cosmological perturbation theory; galaxy clustering; inflation; dark energy theory
资金
- ANR Chaire d'excellence CMBsecond [ANR-09-CEXC-004-01]
- US DOE [DE-FG02-92-ER40699]
- NASA under ATP [NNX10AN14G]
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) divided by 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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