Analytic Continuation in Helicity and O(2,1) Expansions
- 15 October 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 4 (8), 2358-2363
- https://doi.org/10.1103/physrevd.4.2358
Abstract
We discuss the analytic continuation of an azimuthal angular variable in a scattering process to a channel where it may take on large imaginary values. The asymptotic behavior of the many-particle amplitude for large values of that variable is shown to be governed by singularities in an analytically continued helicity amplitude. The procedure is analogous to the usual Regge-Sommerfeld-Watson transformation relating large- behavior to singularities in analytically continued angular momentum amplitudes.
Keywords
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