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Approximate production amplitudes without complex singularities

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Acta Physica Academiae Scientiarum Hungaricae

Abstract

A decomposition of the five point single loop amplitude into a sum over four point amplitudes is used to suppress the contributions of some contracted diagrams at and near specified values of the fixed invariants in such a way as to admit the possibility of single variable dispersion relations without the use of complex integration contours.

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Authors and Affiliations

  1. School of Mathematics and Computer Science, University College of North Wales, Bangor, U. K.

    John Cunningham

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  1. John Cunningham
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Cunningham, J. Approximate production amplitudes without complex singularities. Acta Physica 36, 401–414 (1974). https://doi.org/10.1007/BF03158130

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  • DOI: https://doi.org/10.1007/BF03158130

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