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Acnodes and Cusps and the Mandelstam Representation

Journal Article · · Journal of Mathematical Physics
DOI:https://doi.org/10.1063/1.1704012· OSTI ID:4671177
Complex singularities on the physical sheet associated with acnodes (isolated real points) and cusps are found for a particular Feynman diagram. These singularities enaerge before the appearance of anomalous thresholds, and cause a breakdown of the Mandelstam representation.
Research Organization:
Cambridge Univ., Eng.
Sponsoring Organization:
USDOE
NSA Number:
NSA-17-031303
OSTI ID:
4671177
Journal Information:
Journal of Mathematical Physics, Journal Name: Journal of Mathematical Physics Journal Issue: 7 Vol. 4; ISSN JMAPAQ; ISSN 0022-2488
Publisher:
American Institute of Physics (AIP)
Country of Publication:
Country unknown/Code not available
Language:
English

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