Vacuum phase transition solves the H0 tension
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Date
2018-02-23
Authors
Di Valentino, Eleonora
Linder, Eric V.
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Taking the Planck cosmic microwave background data and the more direct Hubble constant measurement data as unaffected by systematic offsets, the values of the Hubble constant $H_0$ interpreted within the $\Lambda$CDM cosmological constant and cold dark matter cosmological model are in $\sim 3.3 \sigma$ tension. We show that the Parker vacuum metamorphosis model, physically motivated by quantum gravitational effects and with the same number of parameters as $\Lambda$CDM, can remove the $H_0$ tension, and can give an improved fit to data (up to $\Delta\chi^2=-7.5$). It also ameliorates tensions with weak lensing data and the high redshift Lyman alpha forest data. We separately consider a scale dependent scaling of the gravitational lensing amplitude, such as provided by modified gravity, neutrino mass, or cold dark energy, motivated by the somewhat different cosmological parameter estimates for low and high CMB multipoles. We find that no such scale dependence is preferred.
Description
Energetic Cosmos Laboratory. ECL Publications
Keywords
The 2nd international conference of the Energetic Cosmos Laboratory (ECL), ECL19, Energetic Cosmos Laboratory (ECL)
Citation
Di Valentino, E., Linder, E. V., & Melchiorri, A. (2018). Vacuum phase transition solves the H0 tension. Physical Review D, 97(4). https://doi.org/10.1103/PhysRevD.97.043528