Tests of standard cosmology in Hořava gravity, Bayesian evidence for a closed universe, and the Hubble tension

We consider some background tests of standard cosmology in the context of Hořava gravity with different scaling dimensions for space and time, which has been proposed as a renormalizable, higher-derivative, Lorentz-violating quantum gravity model without ghost problems. We obtain the “very strong” a...

Full description

Saved in:
Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2022-10, Vol.82 (10), p.1-15, Article 873
Main Authors: Nilsson, Nils A., Park, Mu-In
Format: Article
Language:English
Subjects:
Astronomical models
Astronomy
Astrophysics and Cosmology
Bayesian analysis
Cosmology
Elementary Particles
Gravity
Hadrons
Heavy Ions
Hubble constant
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Parameterization
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum gravity
Regular Article - Theoretical Physics
Relativity
Specific gravity
String Theory
Universe
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider some background tests of standard cosmology in the context of Hořava gravity with different scaling dimensions for space and time, which has been proposed as a renormalizable, higher-derivative, Lorentz-violating quantum gravity model without ghost problems. We obtain the “very strong” and “strong” Bayesian evidences for our two cosmology models A and B , respectively, depending on the choice of parametrization based on Hořava gravity, against the standard, spatially-flat, LCDM cosmology model based on general relativity. An MCMC analysis with the observational data, including BAO, shows (a) preference of a closed universe with the curvature density parameter Ω k = - 0.005 ± 0.001 , - 0 . 004 - 0.001 + 0.003 , (b) reduction of the Hubble tension with the Hubble constant H 0 = 71 . 4 - 0.9 + 1.2 , 69 . 5 - 0.9 + 1.6 km s - 1 Mpc - 1 for the models A , B , respectively, and also (c) a positive result on the discordance problem. We comment on some possible further improvements for the “cosmic-tension problem” by considering the more complete early-universe physics, based on the Lorentz-violating standard model with anisotropic space-time scaling, consistently with Hořava gravity, as well as the observational data which are properly adopted for the closed universe.
ISSN:1434-6052
1434-6044
1434-6052
DOI:10.1140/epjc/s10052-022-10839-3