Two component theory and electron magnetic moment

The two-component formulation of quantum electrodynamics is studied. The relation with the usual Dirac formulation is exhibited, and the Feynman rules for the two-component form of the theory are presented in terms of familiar objects. The transformation from the Dirac theory to the two-component theory is quite amusing, involving Faddeev-Popov ghost loops of a fermion type with bose statistics. The introduction of an anomalous magnetic moment in the two-component formalism is simple; it is not equivalent to a Pauli term in the Dirac formulation. Such an anomalous magnetic moment appears not to destroy the renormalizability of the theory but violates unitarity

Reflections on the Higgs system

The Higgs system is the great unknown of the standard model. Sofar, the Higgs itself has not been seen, and experimentally, all we have is a questionable estimate of its mass. However, there is more to the Higgs system that the Higgs boson itself. It has a function within the standard model, and that is a point of view that will emphasize. In these lectures we will try to explore the Higgs system and what it means to the facts as observed so far. Symmetry properties, screening theorem, photon mass, parity violation, non-minimal Higgs systems are subjects that will be discussed in this context.Series of lectures exploring the Higgs syste