Quantum chromodynamics electrodynamics

The flavor and the ordinary orbitals are inert and it is the color orbital which carries the freeon dynamics in the same ways as the freeon (spatial) orbitals carry the dynamics for electronic systems. It should be noted that the two basic field theories are quantum electrodynamics (QED) and quantum chromodynamics (QCD).The color force is also an exchange force in which the several colors are exchanged. 

In one of his conjectures [23], de Broglie described the photon as resulting from the fusion of two spin- /2 particles, an electron and a positron (whose spins would add and charges cancel) or a neutrino and its antineutrino. Although de Broglie managed to derive Maxwell s equations from this model, his idea was not retained in further developments of quantum electrodynamics. But it was somehow revived in the standard model of quantum chromodynamics, where it is assumed that the strong interaction between quarks constitutive of nucleons is mediated by massless... 

Our principal aim in this chapter is to review briefly the basic ideas of field theory, which we shall illustrate with examples from quantum electrodynamics (QED) and the theory of strong interactions, quantum chromodynamics (QCD). Of necessity, we must assume that the reader has some knowledge of field theory and is conversant with the idea of Feynman diagrams and with the Dirac equation. We shall then give a resume of the theory and phenomenology of the weak interactions as they stood at the time of the inception of the new ideas about quarks and gluons in the early 1970s. The chapter ends with some technical results which will be very useful in later chapters. 

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