S-Matrix Singularity Structure in the Physical Region. I. Properties of Multiple Integrals
- 1 March 1969
- journal article
- research article
- Published by AIP Publishing in Journal of Mathematical Physics
- Vol. 10 (3) , 494-502
- https://doi.org/10.1063/1.1664866
Abstract
We obtain the real singularities and corresponding discontinuities of a class of multiple integrals over real contours. Our aim is to give a unified treatment, obtaining, by elementary mathematical methods, both previously known results and some new generalizations. In a subsequent paper the results are applied to unitarity integrals.Keywords
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