2 research outputs found
The Hubble Constant in the Axi-Higgs Universe
The CDM model provides an excellent fit to the CMB data. However, a
statistically significant tension emerges when its determination of the Hubble
constant is compared to the local distance-redshift measurements. The
axi-Higgs model, which couples an ultralight axion to the Higgs field, offers a
specific variation of the CDM model. It relaxes the tension as
well as explains the Li puzzle in Big-Bang nucleosynthesis, the clustering
tension with the weak-lensing data, and the observed isotropic cosmic
birefringence in CMB. In this paper, we demonstrate how the and
tensions can be relaxed simultaneously, by correlating the axion impacts on the
early and late universe. In a benchmark scenario ( eV)
selected for experimental tests soon, the analysis combining the CMB+BAO+WL+SN
data yields km/s/Mpc and .
Combining this (excluding the SN (supernovae) part) with the local
distance-redshift measurements yields km/s/Mpc, while
is slightly more suppressed.Comment: 15 pages, 11 figures, final version published on PRR Lette