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ANALYTICITY OF THE PRODUCTION AMPLITUDE IN THE HIGHER ORDER DIAGRAM

Journal Article · · Progr. Theoret. Phys. (Kyoto)
DOI:https://doi.org/10.1143/PTP.30.647· OSTI ID:4116860
Partial-wave s-singularity of the production amplitude is analyzed in the cases of pi + N yields 2 pi + N and 2 pi + N yields 2 pi + N. It is shown that the complex singularities of the fourthorder diagram coincide completely with those obtained from the corresponding pole diagram. Although the left-hand and right-hand singularities simultaneously appear on some region of the s-t plane, they are shown to be separated unambigrously. Detailed discussions about more general diagrams are also made and similar results are obtained. (auth)
Research Organization:
Tohoku Univ., Sendai
Sponsoring Organization:
USDOE
NSA Number:
NSA-18-009188
OSTI ID:
4116860
Journal Information:
Progr. Theoret. Phys. (Kyoto), Journal Name: Progr. Theoret. Phys. (Kyoto) Vol. Vol: 30
Country of Publication:
Country unknown/Code not available
Language:
English

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