ABSTRACT
Today Fermi’s theory of beta decay has been superseded by the modern-day theory of electroweak interactions. If we remained consistent with the nomenclature for the electromagnetic and strong interactions, we would call this theory Quantum Geusidynamics, or QGD. This nomenclature did not catch on, and today people simply refer to the theory as Electroweak theory. All known quarks and leptons undergo weak interactions. Neutrino-electron scattering is really hard to experimentally implement. The epsilon tensor is a fully antisymmetric tensor that has as many indices as there are dimensions. In LEP experiments – which operated at energies comparable or a bit bigger than the mass of the Z -boson – weak interactions were observed to be stronger than electromagnetic ones.
