Hubble Sinks In The Low-Redshift Swampland
Cosmology and Nongalactic Astrophysics
2021-05-05 v3 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
Local determinations of the Hubble constant favour a higher value than Planck based on CMB and CDM. Through a model-independent expansion, we show that low redshift () data comprising baryon acoustic oscillations (BAO), cosmic chronometers and Type Ia supernovae has a preference for Quintessence models that lower relative to CDM. In addition, we confirm that an exponential coupling to dark matter cannot alter this conclusion in the same redshift range. Our results leave open the possibility that a coupling in the matter-dominated epoch, potentially even in the dark ages, may yet save from sinking in the string theory Swampland.
Cite
@article{arxiv.2006.00244,
title = {Hubble Sinks In The Low-Redshift Swampland},
author = {Aritra Banerjee and Haiying Cai and Lavinia Heisenberg and Eoin Ó Colgáin and M. M. Sheikh-Jabbari and Tao Yang},
journal= {arXiv preprint arXiv:2006.00244},
year = {2021}
}
Comments
4 pages; v2 comments, references added; v3 appendix added on CPL, matches published version