Abstract
We show that a relativistically covariant, unitary, and causative scattering matrix, which is finite in each order of perturbation theory, can be constructed using fundamental postulates of quantum field theory and give a physical interpretation of the results obtained.
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Khokhlov, I.A. Scattering Matrix in Quantum Field Theory. Russian Physics Journal 44, 827–836 (2001). https://doi.org/10.1023/A:1013699601590
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DOI: https://doi.org/10.1023/A:1013699601590