Speaker
Description
The Dark Energy Spectroscopic Instrument (DESI) is a groundbreaking astronomical survey designed to map the large-scale structure of the universe and probe the nature of dark energy and the dark sector. Understanding this sector—including the sum of neutrino masses, the number of effective neutrino species, and the dynamics of dark energy—is a central goal of modern cosmology, bridging astrophysics and particle physics. Along with a brief cosmological overview, I will present recent advances in dark energy and neutrino research, highlighting new results from DESI’s second data release (DR2). DESI has now produced the most extensive 3D map of the universe to date, achieving sub-percent precision in measuring the expansion history and surpassing all previous spectroscopic surveys. Notably, the most recent findings suggest that dark energy may evolve over time, challenging the standard cosmological constant model and raising questions about the robustness of traditional methods used to constrain neutrino mass through cosmological data. I will also introduce novel cosmic web analysis techniques designed to enhance sensitivity to neutrino mass, including alternative clustering approaches that extend beyond the ΛCDM paradigm. Finally, I will explore the broader implications for particle and high-energy physics, emphasizing future synergies that could refine our understanding of neutrinos and fundamental forces.
