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Comment on Positive Regge-Cut Discontinuities
Phys. Rev. D 7, 558 – Published 15 January, 1973
DOI: https://doi.org/10.1103/PhysRevD.7.558
Abstract
Abarbanel has recently derived a formula for the discontinuity across the two-Reggeon branch point using direct-channel unitarity. His derivation assumes that a "two-Reggeon irreducible" kernel does not contain -plane singularities in the vicinity of the branch point. We investigate this assumption for the two-Pomeranchon cut using an extension of the multi-Regge arguments of Finkelstein and Kajantie. We verify the assumption for , but the result is inconclusive otherwise.
Original Article
Discontinuities Across Branch Cuts in the Angular Momentum Plane
Phys. Rev. D 6, 2788 (1972)
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Omitted endnote
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Omitted endnote