Speaker
Description
Neutrino oscillations show that neutrinos are massive, which the Standard Model does not account for. The origin of their tiny masses and their large mixing remains open. This talk explores an approach in which both emerge from the thermodynamics of SU(2) Yang–Mills theory. In this picture, the meV scale of neutrino masses is tied to the temperature of the cosmic microwave background. The pattern of lepton mixing then follows from a small set of quantities, fixed by the charged-lepton sector. I will sketch how the resulting mass matrix meets the current global fit. The predictions are sharp: $\delta_{\rm CP}=\pi$, $\theta_{23}$ in the first octant, $m_1=0$ with $\sum m_\nu\approx 59\,$meV, and $\sin^2\theta_{12}=0.3077$, which JUNO will test within a few years.