Dynamics at Infinite Momentum

@article{Weinberg1966DynamicsAI,
  title={Dynamics at Infinite Momentum},
  author={Steven Weinberg},
  journal={Physical Review},
  year={1966},
  volume={150},
  pages={1313-1318}
}
  • S. Weinberg
  • Published 28 October 1966
  • Physics
  • Physical Review
Old-fashioned perturbation theory is applied to a relativistic theory in a reference frame with infinite total momentum. It is found that many undesirable diagrams disappear. The contribution of the remaining diagrams is described by a new set of rules with properties intermediate between those of Feynman diagrams and old-fashioned diagrams, e.g., energy denominators become covariant, and Feynman parameters appear naturally. The new rules are used to derive some integral equations. 

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