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Unresolved Anomalies and Tensions in the Standard Cosmological Model

Unresolved Anomalies and Tensions in the Standard Cosmological Model 14 FebbraioFeb 2024 14:30 - 17:30 UTC

14 March 2024 - 2:30 pm CET | Eleonora Di Valentino, Research Fellow at the University of Sheffield - Sheffield – England

 
Abstract: The standard Lambda Cold Dark Matter cosmological model has been incredibly successful in explaining a wide range of observational data, from the cosmic microwave background radiation to the large-scale structure of the universe. However, recent observations have revealed a number of inconsistencies among the model's key cosmological parameters, which have different levels of statistical significance. These include discrepancies in measurements of the Hubble constant, the S8 tension, and the CMB tension. While some of these inconsistencies could be due to systematic errors, the persistence of such tensions across various probes suggests a potential failure of the canonical LCDM model. I will examine these inconsistencies and discuss possible explanations, including modifications to the standard model, that could potentially alleviate them. However, I will also discuss the limitations of these proposed solutions and note that none of them have successfully resolved the discrepancies.
Short bio:  Eleonora Di Valentino has a PhD from the University of Rome la Sapienza in Theoretical Physics with a thesis in Cosmology. She then joined the IAP in Paris as a Lagrange fellow and the Planck team to work on the legacy release. She then moved to the University of Manchester in the UK as a postdoc and she joined the DES collaboration. After that she became an Addison-Wheeler fellow at Durham University, and she is now a Royal Society Dorothy Hodgkin Research Fellow at the University of Sheffield with a project to work on the cosmological tensions.
Where: Accademia Pontaniana, Via Mezzocannone 8, 80134 Napoli NA. The colloquium will be also broadcast online, on Zoom.
How to join online: https://us02web.zoom.us/j/84640651456?pwd=TlpSNkZKK25MVkxFdngySm1HZTh4QT09
Meeting ID: 846 4065 1456
Passcode: 656302

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