Speaker
Hoang Nhan Luu
(The Hong Kong University of Science and Technology)
Description
The $\Lambda$CDM model provides an excellent fit to the CMB data. However, a statistically significant tension emerges when its determination of the Hubble constant $H_0$ is compared to the local distance-redshift measurements. The axi-Higgs model, which couples ultralight axions to the Higgs field, offers a specific variation of the $\Lambda$CDM model. It relaxes the $H_0$ tension as well as explains the $^7$Li puzzle in Big-Bang nucleosynthesis, the $S_8$ tension with the weak-lensing data, and the observed isotropic cosmic birefringence in CMB. In this letter, we demonstrate how the $H_0$ and $S_8$ tensions can be resolved simultaneously, by correlating the axion impacts on the early and late universe.
Primary authors
Hoang Nhan Luu
(The Hong Kong University of Science and Technology)
Prof.
Henry Tye
Dr
Lingfeng Li
Yucheng Qiu
Prof.
Tao Liu
Fung Leo