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- W2021284311 abstract "We covariantize the decoupling limit of massive gravity proposed in [de Rham, G. Gabadadze, and A. J. Tolley, Phys. Rev. Lett. 106, 231101 (2011).] and study the cosmology of this theory as a proxy, which embodies key features of the fully nonlinear covariant theory. We first confirm that it exhibits a self-accelerating solution, similar to what has been found in [C. de Rham, G. Gabadadze, L. Heisenberg, and D. Pirtskhalava, Phys. Rev. D 83, 103516 (2011).], where the Hubble parameter corresponds to the graviton mass. For a certain range of parameters fluctuations relative to the self-accelerating background are stable and form an attractor solution. We also show that a degravitating solution can not be constructed in this covariantized proxy theory in a meaningful way. As for cosmic structure formation, we find that the helicity-0 mode of the graviton causes an enhancement relative to $ensuremath{Lambda}mathrm{CDM}$. For consistency we also compare proxy theories obtained starting from different frames in the decoupling limit and discuss the possibility of obtaining a nonrepresentative proxy theory by choosing the wrong starting frame." @default.
- W2021284311 created "2016-06-24" @default.
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- W2021284311 date "2011-08-05" @default.
- W2021284311 modified "2023-10-18" @default.
- W2021284311 title "Cosmology of the Galileon from massive gravity" @default.
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- W2021284311 doi "https://doi.org/10.1103/physrevd.84.043503" @default.
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