Phantom braneworld and the Hubble tension

TL;DR

Phantom braneworld models with induced gravity can naturally explain higher local measurements of the Hubble constant and fit observational data better than some other dark energy models, despite some limitations.

Contribution

This paper tests the background evolution of phantom braneworld scenarios against current observational data, highlighting their potential to resolve the Hubble tension.

Findings

Prefers higher H_0 values without R19 prior

Provides a better fit to local measurements

Among dark energy models, offers a compelling explanation of cosmic evolution

Abstract

Braneworld models with induced gravity exhibit phantom-like behaviour of the effective equation of state of dark energy. They can, therefore, naturally accommodate higher values of $H_0$, preferred by recent local measurements, while satisfying the CMB constraints. We test the background evolution in such phantom braneworld scenarios with the current observational datasets. We find that the phantom braneworld prefers a higher value of $H_0$ even without the R19 prior, thereby providing a much better fit to the local measurements. Although this braneworld model cannot fully satisfy all combinations of cosmological observables, among existing dark energy candidates the phantom brane provides one of the most compelling explanations of cosmic evolution.