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Article overview
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Hubble Sinks In The Low-Redshift Swampland | Aritra Banerjee
; Haiying Cai
; Lavinia Heisenberg
; Eoin Ó Colgáin
; M. M. Sheikh-Jabbari
; Tao Yang
; | Date: |
30 May 2020 | Abstract: | Local determinations of the Hubble constant $H_0$ favour a higher value than
Planck based on CMB and $Lambda$CDM. Through a model-independent expansion, we
show that low redshift ($z lesssim 0.7$) data comprising baryon acoustic
oscillations (BAO), cosmic chronometers and Type Ia supernovae has a preference
for Quintessence models that lower $H_0$ relative to $Lambda$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 $H_0$ from sinking in the string theory Swampland. | Source: | arXiv, 2006.0244 | Services: | Forum | Review | PDF | Favorites |
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