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2017

$H_0$ tension as a hint for a transition in gravitational theory

Khosravi, Nima, Baghram, Shant, Afshordi, Niayesh et al.

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We propose a cosmological model, \"u$\Lambda$CDM, based on {\it \"uber-gravity}, which is a canonical ensemble average of many theories of gravity.

In this model, we have a sharp transition from (a purely) $\Lambda$CDM era to a phase in which the Ricci scalar is a constant.
This transition occurs when the Ricci scalar reaches a critical scale or alternatively at a transition redshift, $z_\oplus$.
We use the observations of baryonic acoustic oscillations (BAO) and Supernovae Ia (SNe), as well as the cosmic microwave background (CMB) data to constrain \"u$\Lambda$CDM.

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