2023/11/08 by Igor de O. C. Pedreira, Micol Benetti, Elisa G. M. Ferreira +2 · 2 voices
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Artificial intelligence #Black Holes and Theoretical Physics #Computer science #Cosmology and Gravitation Theories #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.109.103525
arxiv published 2023/11/08 · openalex publication_date 2024/05/14 · openalex created_date 2024/05/15 · arxiv updated 2024/05/15 · openalex updated_date 2026/08/01
Beyond-\mathrm\ensuremathΛCDM models have been proposed to address various shortcomings of the standard cosmological model, such as the ``Hubble tension.'' These models often have an impact on the discrepancy in the amplitude of matter clustering, the ``\ensuremathσ8 tension.'' To explore the interplay between the two tensions, we suggest a simple method to visualize the relation between the two parameters: H0 and \ensuremathσ8. For a given extension of the \mathrm\ensuremathΛCDM model and dataset, we plot the relation between H0 and \ensuremathσ8 for different amplitudes of the beyond-\mathrm\ensuremathΛCDM physics. In this work, we use this visualization method to illustrate the trend of selected cosmological models, including nonminimal Higgs-like inflation, early dark energy, a varying effective electron mass, an extra number of relativistic species and modified dark energy models. Although already studied in the literature, some of these models have not been analyzed in view of the two joint tensions. We stress that the method used here could be a useful diagnostic tool to illustrate the behavior of complex cosmological models with many parameters in the context of the H0 and \ensuremathσ8 tensions.