| See description |
| C. Fidler + J. Lesgourgues, RWTH Aachen University |
| Event Type: Special Seminar |
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| Time: 11:00 AM - 12:00 PM |
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| Location: 726 Broadway, 902, Lg Conf |
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| Abstract: Christian Fidler: From Newton to Einstein: Large-Scale Signatures of GR in Galaxy Surveys.
Abstract: Newtonian N-body simulations can be consistently embedded in general relativity. I discuss the basic framework of Newtonian motion gauges, the application of a GR dictionary in practice and which effects are missed by an ordinary Newtonian analysis.
Julien Lesgourgues : Could the Hubble tension hint at new particle physics
Abstract: the fact that cosmological data sets (like measurements of H0 or sigma8) are in tension with others is a model-dependent statement. It is however very difficult to reconcile these datasets with simple extensions of the minimal LambdaCDM model. Instead I will argue that new particle physics (with a dark sector and dark forces) could do the job. I will present the results of very recent fits to the data supporting this claim. |