In this textbook for graduate students in physics the author carefully  analyses the role of causality in Q.E.D. This new approach avoids  ultraviolet divergences, so that the detailed calculations of scattering  processes and proofs can be carried out in a mathematically rigorous  manner. Significant themes such as renormalizability, gauge invariance,  unitarity, renormalization group, interacting fields and axial anomalies  are discussed. The extension of the methods to non-abelian gauge  theories is briefly described. The book differs considerably from its  first edition: Chap. 3 on Causal Perturbation Theory was completely  rewritten and Chap. 4 on Properties of the S-Matrix and Chap. 5 on Other  Electromagnetic Couplings are new.
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Finite Quantum Electrodynamics: The Causal Approach
Labels: Physics