Theory of the Fermi Interaction

摘要: The representation of Fermi particles by two-component Pauli spinors satisfying a second order differential equation and the suggestion that in β decay these act without gradient couplings leads to an essentially unique weak four-fermion coupling. It is equivalent equal amounts vector axial coupling with neutrinos conservation leptons. (The relative sign not determined theoretically.) taken be "universal"; lifetime μ agrees within experimental errors 2%. part is, analogy electric charge, assumed renormalized virtual mesons. This requires, for example, pions are also "charged" sense there direct interaction which, say, π0 goes π- electron neutrino. decays strange will result qualitatively if universality extended include involving Λ or Σ fermion. Parity then conserved even those like K→2π 3π which involve no neutrinos. theory at variance measured angular correlation neutrino He6, fact fewer than 10^-4 pion into