Analytic Structure of Collision Amplitudes in Perturbation Theory
- 1 September 1960
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 119 (5), 1763-1783
- https://doi.org/10.1103/physrev.119.1763
Abstract
Some methods are developed for studying the singularities of collision amplitudes in perturbation theory as functions of two of the invariant energies, , , and . It is shown that:
Keywords
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