Cosmology in warped massive gravity
Abstract
We study the cosmological dynamics and predictions in the theory of warped massive gravity. This set-up postulates a five-dimensional ghost-free massive graviton with a brane-localized four-dimensional massive gravity potential, and has the virtue of raising the strong-coupling scale of the 4D theory. We identify two classes of models that lead to decoupled equations for the scale factor on the brane: one characterized by a particular choice of boundary conditions for the St\"uckelberg fields and one characterized by a special tuning between the coefficients of the 5D and 4D potentials. In the first case, we find interesting solutions including a cosmological bounce without the need of exotic matter. The second case leads to a modified Friedmann equation, and comparison with data shows the potential of the model to alleviate the Hubble tension.
Cite
@article{arxiv.2509.09270,
title = {Cosmology in warped massive gravity},
author = {Sebastian Garcia-Saenz and Yuxiang Wei and Xue Zhou},
journal= {arXiv preprint arXiv:2509.09270},
year = {2026}
}
Comments
29 pages; v2: matches published version