Renormalization group corrections to gravity are applied at the action level to cosmology, yielding a constant gravitational slip and a low-redshift f sigma8 modification that may ease the sigma8 tension.
Scalar-Tensor gravity with system-dependent potential and its relation with Renormalization Group extended General Relativity
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abstract
We show that Renormalization Group extensions of the Einstein-Hilbert action for large scale physics are not, in general, a particular case of standard Scalar-Tensor (ST) gravity. We present a new class of ST actions, in which the potential is not necessarily fixed at the action level, and show that this extended ST theory formally contains the Renormalization Group case. We also propose here a Renormalization Group scale setting identification that is explicitly covariant and valid for arbitrary relativistic fluids.
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gr-qc 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Cosmological framework for renormalization group extended gravity at the action level
Renormalization group corrections to gravity are applied at the action level to cosmology, yielding a constant gravitational slip and a low-redshift f sigma8 modification that may ease the sigma8 tension.