The Reason Why Neutrinos Are Left-Handed

The left-handedness of neutrinos is an undeniable physical phenomenon. Because the first principles of the Standard Model are insufficient to explain this property, the issue is addressed through the chirality postulate, which implies that the weak interaction violates parity. While postulates are acceptable tools in a descriptive theory, they are less satisfactory in a conceptual theory that seeks to eliminate such assumptions. In this article, we show how the left-handedness of neutrinos emerges from first principles within the Structural Model of particle physics.