Speaker
Description
High-energy neutrinos have become a quantitative probe of non-thermal processes in the universe. Over the past decade, cubic-kilometer scale detectors have established a diffuse astrophysical neutrino flux from the TeV to PeV range and identified candidate events reaching the PeV–EeV energies. Recent highlights include the first >5σ discovery of Galactic neutrino emission, indications of spectral structure in the diffuse flux, and increasingly sensitive multimessenger and time-dependent searches targeting active galaxies and transient sources. At the highest energies, optical and radio techniques are extending sensitivity toward the EeV regime, probing connections to ultra-high-energy cosmic rays.
Despite this progress, key questions remain: the origin of the diffuse flux, the identification of Galactic PeVatrons, the contribution of transient sources, and the evolution of neutrino flavor composition with energy. In this talk, I will review recent experimental results across the GeV–EeV range and discuss their implications for particle astrophysics. I will conclude with the status of the IceCube Upgrade and its expected impact on calibration, flavor sensitivity, as well as transient and supernova detection.
