CORDIS Project
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This project aims to investigate discrepancies in the expansion rate of the universe and the density fluctuations of galaxies, potentially indicating new properties of dark matter and dark energy. The research will develop tools to identify new physics mechanisms that could explain these cosmic tensions.
It has recently been established that the current expansion rate of the universe (i.e, the Hubble constant) as measured by local probes is discrepant at 5σ with that predicted in the standard Λ cold dark matter (ΛCDM) model calibrated onto cosmic microwave background (CMB) data.
Additionally, analyses of the latest galaxy weak lensing surveys find an amplitude of density fluctuations on large scales (the S8 parameter) that is about 2−3σ lower than what is predicted in ΛCDM.
This growing “crisis…
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
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