John Clive Ward, “Renormalization Theory of the Interactions of Nucleons, Mesons, and Photons” in Physical Review 84 No. 5, December 1, 1951, pp 897-902 in the issue of pp 869-1078. Original wrappers. Spine and cover edges all considerably sunned; also, there's a small chip out of the bottom of the spine; also, there's a little bump art top right corner. VG $150
“In quantum field theory, a Ward–Takahashi identity is an identity between correlation functions that follows from the global or gauge symmetries of the theory, and which remains valid after renormalization. The Ward–Takahashi identity of quantum electrodynamics was originally used by John Clive Ward [this paper]and Yasushi Takahashi to relate the wave function renormalization of the electron to its vertex renormalization factor F1(10), guaranteeing the cancellation of the ultraviolet divergence to all orders of perturbation theory. Later uses include the extension of the proof of Goldstone's theorem to all orders of perturbation theory. The Ward–Takahashi identity is a quantum version of the classical Noether's theorem, and any symmetries in a quantum field theory can lead to an equation of motion for correlation functions. This generalized sense should be distinguished when reading literature, such as Michael Peskin and Daniel Schroeder's textbook from the original sense of the Ward identity.”--Wikipedia (“Ward-Takahashi Identity”)
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