2020/01/31 by Revaz Beradze, Merab Gogberashvili
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark matter #Galaxies: Formation, Evolution, Phenomena #Hubble's law #Ionization #Mechanism (biology) #Recombination #Universe #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1016/j.dark.2021.100841
published as Physics of the Dark Universe 32 (2021) 100841 · The journal version
openalex created_date 2020/01/23 · openalex publication_date 2021/05/01 · arxiv created 2021/06/04 · arxiv updated 2021/06/07 · openalex updated_date 2026/08/05
In the recently suggested non-standard, quasi-molecular mechanism of recombination, the presence of neighboring proton increases the ionization energy and decreases the final recombination rate of hydrogen. Both these two effects can lead to the larger value of the present expansion rate of the universe obtained using CMB data and standard cosmological model, and thus are able to reduce or resolve the Hubble tension problem. We note also that due to the quasi-molecular channel the recombination began earlier, what potentially can solve the sigma-eight tension, since the CMB-predicted value of the late matter density will be decreased.