Orateur
Sebastian Trojanowski
(National Centre for Nuclear Research, Poland & Astrocent, NCAC PAS)
Description
While standard LambdaCDM cosmology remains remarkably successful, persistent observational discrepancies suggest the need for physics beyond minimal frameworks. In the talk, we will explore the cosmological implications of deeper, interconnected structures within the dark sector, focusing on new physics interactions between neutrinos, dark matter, and light mediators. We will examine how they could alter early-universe thermodynamics, neutrino free-streaming, and cosmic structure formation. By bridging particle physics models with precision cosmology, coupled dark sectors can naturally impact cosmological tensions while leaving distinct, testable signatures in both next-generation surveys and terrestrial laboratory experiments.