Speaker
Aleksandr Chatrchyan
(Nordita)
Description
The Hubble Tension is the discrepancy between the measured value of the Hubble parameter $H_0$ and its $\Lambda$CDM model prediction using CMB data. New Early Dark Energy (NEDE) addresses this tension using a triggered phase transition in the dark sector. In this work we constrain the properties of NEDE using recent datasets. We study the equation of state parameter, characterizing the post-phase transition fluid, allowing it to evolve in time. Our results indicate that data is compatible with a simple time dependence that could arise from a mixture of radiation and a stiff fluid. Our model shows a significant reduction of the tension down to below $3\sigma$.
Author
Aleksandr Chatrchyan
(Nordita)
Co-authors
Florian Niedermann
Prof.
Martin Snoager Sloth
Dr
Vivian Poulin
(LUPM, CNRS & U. de Montpellier, France)
