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HEP Colloquia 2025
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Sala Consiliare (Department of Physics)
Sala Consiliare
Department of Physics
Description
A short blanket for cosmology: linking tensions across the Early and Late universe
The recent release of Baryonic Acoustic Oscillation (BAO) measurements from the DESI collaboration has provided new insights into the persistent tensions shaping modern cosmology. The nature of the Universe's dark sector may be closer than ever to being unveiled, as these results suggest that the ΛCDM model could soon be challenged as the standard cosmological paradigm.
Several studies have highlighted that DESI data impose extremely tight constraints on the sum of neutrino masses, so stringent that they appear inconsistent with neutrino oscillation experiments. Some analyses have even explored the possibility of an effective negative contribution to the neutrino mass, seemingly favored when combining DESI, CMB, and CMB-lensing datasets.
In this talk, I will present our investigation into the so-called "neutrino mass anomaly". We find that an excess in the lensing potential could reconcile these discrepancies by effectively absorbing the neutrino mass anomaly. This result makes clear how tensions between early- and late-universe measurements are intensifying as cosmological data become increasingly precise.
Several studies have highlighted that DESI data impose extremely tight constraints on the sum of neutrino masses, so stringent that they appear inconsistent with neutrino oscillation experiments. Some analyses have even explored the possibility of an effective negative contribution to the neutrino mass, seemingly favored when combining DESI, CMB, and CMB-lensing datasets.
In this talk, I will present our investigation into the so-called "neutrino mass anomaly". We find that an excess in the lensing potential could reconcile these discrepancies by effectively absorbing the neutrino mass anomaly. This result makes clear how tensions between early- and late-universe measurements are intensifying as cosmological data become increasingly precise.
Organised by
Prof. Umberto D'Alesio - umberto.dalesio@ca.infn.it
Dr. Nanako Kato - nanako.kato@dsf.unica.it
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