English

Phantom braneworld and the Hubble tension

Cosmology and Nongalactic Astrophysics 2021-12-28 v2 General Relativity and Quantum Cosmology

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 H0H_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 H0H_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.

Keywords

Cite

@article{arxiv.2107.03271,
  title  = {Phantom braneworld and the Hubble tension},
  author = {Satadru Bag and Varun Sahni and Arman Shafieloo and Yuri Shtanov},
  journal= {arXiv preprint arXiv:2107.03271},
  year   = {2021}
}

Comments

16 pages, 6 figures, matches the published version in ApJ

R2 v1 2026-06-24T03:58:08.414Z