ABSTRACT
All the particles are represented by Dirac fields and GF is the Fermi constant. The Lagrangian is the product of two operators: the nuclear current Hμ,
which induces the transition between heavy particles, n → p, and the lepton current Lμ, which creates the lepton pair from the vacuum. Assuming the validity of (15.2) we calculate the mean lifetime of the neutron and the electron asymmetry with respect to the spin of the neutron. Comparing with experimental values we can determine the two constants which appear in (15.2).
