A relativistic quantum field theory provides a dynamical framework for explaining a vast variety of physical phenomena: not only are all properties of bound and scattering states contained in the theory, but also processes in which particle number changes are described. The ultimate model that physicists are seeking is the unified theory, which must account for everything around us — a variety which is practically unlimited. It comes as no surprise therefore that realistic field theories are not exactly solvable, and we must resort to approximate but accurate methods of calculation — as already we do in simple classical mechanical

EP - 360 PB - Princeton University Press PY - 1985 SN - null SP - 211 T2 - Current Algebra and Anomalies UR - http://www.jstor.org/stable/j.ctt7ztmc8.6 Y2 - 2021/03/07/ ER -