## (1) Presentation(s)

Jeu. 09/02/2023 14:00 Salle des Séminaires, Bâtiment 21, Etage 4 HEROLD Laura (MPI Garching) A New Constraint on Early Dark Energy using the Profile Likelihood (LUPM/Particules, Astroparticules, Cosmologie : Théorie) Sommaire: A dark energy-like component in the early universe, known as early dark energy (EDE), is a proposed solution to the Hubble tension. While in an MCMC analysis, the EDE model is disfavoured by Cosmic Microwave Background and large-scale structure data, a frequentist profile likelihood analysis prefers consistently larger amounts of EDE and with that a Hubble constant consistent with low-redshift probes. The difference between MCMC and profile likelihood can be explained by prior volume effects in the MCMC analysis. I will describe how a frequentist profile likelihood yields important complementary information compared to a Bayesian MCMC analysis. Pour plus d'informations, merci de contacter Poulin V. |