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Keyword: hybrid inflation ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Alleviating cosmological tensions with a hybrid dark sector

   Teixeira, Poulot, van de Bruck, Di Valentino and Poulin · Physical review. D/Physical review. D. · 2025

   The authors test a model in which dark energy and dark matter scalar fields interact, using CMB, BAO and supernova data, and report effects on the Hubble and S_8 tensions with mixed statistical support.

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   1. UncheckedIn this hybrid dark sector model, a stronger coupling goes with lower ω_m and a mild drop in the weak-lensing parameter S_8, which may bear on the S_8 tension.“In addition, we find that higher values of the coupling parameter are correlated with lower values of $ω_m$, and a mild decrease of the weak-lensing parameter $S_8$, potentially relevant to address the $S_8$ tension.”
   2. UncheckedStatistical comparison with standard cosmology is mostly inconclusive for this hybrid dark sector model, except with SH0ES data, where evidence is moderate.“Bayesian model comparison, however, reveals inconclusive results for most datasets, unless S$H_0$ES data are included, in which case a moderate evidence in favour of the hybrid model is found.”