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| Description | Speaker: Andrew Liddle Title: Interpreting DESI's evidence for evolving dark energy Room: 3024 Host: John Terning Abstract: We are all bored with LambdaCDM and seeking new cosmological physics to explore. For a decade the Hubble tension has been motivating vast numbers of new physics proposals, while this year the DESI collaboration claimed `tantalising hints’ of dark energy evolution from combined cosmic microwave background, baryon acoustic oscillation, and supernova data. We analyse both these lines of evidence from a Bayesian perspective. We argue that reduced tension alone cannot be used a robust signature of new physics, and that the best-fit evolving dark energy models create a new form of cosmic coincidence. In each case careful assessment of model and parameter priors is crucial, and models capable of fitting the data appear a priori unlikely. |
| Date | Mon, May 13, 2024 |
| Time | 1:30pm-3:00pm PDT |
| Duration | 1 hour 30 minutes |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Tue, May 14, 2024 4:41pm PDT |
| Send Reminder | Yes - 0 days 6 hour 0 minutes before start |
