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Ghost-free non-local F(R) gravity compatible with ACT

We confront the ghost-free non-local F(R) gravity theories with the latest Atacama Cosmology Telescope (ACT) constraints on the spectral index of the scalar perturbations and the updated constraints of Planck/BICEP on the tensor-to-scalar ratio. After reviewing how the ghost-free non-local version o...

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Principais autores: Shin’ichi Nojiri, Sergei Odintsov, V.K. Oikonomou
Format: Artigo
Sprog:Inglês
Udgivet: Elsevier 2026-03-01
Serier:Physics Letters B
Fag:
Non-local gravity
F(R) Gravity
Cosmological perturbations
ACT
Planck
Online adgang:http://www.sciencedirect.com/science/article/pii/S0370269326001449
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