COMPLEX SINGULARITIES OF THE AMPLITUDES FOR DIRECT NUCLEAR REACTIONS (in Russian)
Journal Article
·
· Zh. Eksperim. i Teor. Fiz.
OSTI ID:4718971
Rules for separating complex amplitude singularities lying on the physical sheet are indicated for nonrelativistic single-loop diagrams. A classification is presented for complex singularities of a nonrelativistic diagram with arbitrary masses. With triangular diagrams of direct nuclear reactions of the type A + x yields B + y + z taken as an example it is shown that complex singularities with respect to the momentum transfer t/sub xy/ may be close to the physical region. A single analytic expression for the amplitude F/ sup 31/ of a triangular diagram is derived and the asymptotic behavior of F/sub 31/ with variation of t/sub xy/ is investigated at large distances from the singularity. (auth)
- Research Organization:
- Moscow State Univ.
- NSA Number:
- NSA-17-009615
- OSTI ID:
- 4718971
- Journal Information:
- Zh. Eksperim. i Teor. Fiz., Journal Name: Zh. Eksperim. i Teor. Fiz. Vol. Vol: 43
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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