Journal
PHYSICS LETTERS B
Volume 794, Issue -, Pages 135-142Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2019.05.045
Keywords
-
Funding
- DOE HEP grants [DOE DE-FG02-04ER41338, FG02-06ER41449]
- McWilliams Center for Cosmology, Carnegie Mellon University
- de Sitter PhD fellowship of the Netherlands Organization for Scientific Research (NWO)
- LabEx ENS-ICFP [ANR-10-LABX-0010/ANR-10-IDEX-0001-02 PSL*]
- NWO
- Dutch Ministry of Education, Culture and Science (OCW)
- D-ITP consortium, a program of the NWO - OCW
Ask authors/readers for more resources
We study the first cosmological implications of the mimetic theory of massive gravity recently proposed by Chamseddine and Mukhanov. This is a novel theory of ghost-free massive gravity which additionally contains a mimetic dark matter component. In an echo of other modified gravity theories, there are self-accelerating solutions which contain a ghost instability. In the ghost-free region of parameter space, the effect of the graviton mass on the cosmic expansion history amounts to an effective negative cosmological constant, a radiation component, and a negative curvature term. This allows us to place constraints on the model parameters-the graviton mass and the Stuckelberg vacuum expectation value-by insisting that the effective radiation and curvature terms be within observational bounds. The late-time acceleration must be accounted for by a separate positive cosmological constant or other dark energy sector. We impose further constraints at the level of perturbations by demanding linear stability. We comment on the possibility of distinguishing this theory from Lambda CDM with current and future large-scale structure surveys. (C) 2019 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available