Summary
It is shown that in the Omnès method of calculating the optical potential from the scattering amplitude at high energies the requirement of Mandelstam analyticity in cos θ-plane can be replaced by that of analyticity inside an ellipse.
Riassunto
Si dimostra che nel metodo di Omnès per caloolare il potenziale ottico dall’ampiezza di scattering ad alte energie, la condizi one di analiticità di Mandelstam. nel piano cosθ può essere sostituita da quella di analiticità entro un’ellisse.
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References
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Chadan, K. Optical model and analiticity in momentum transfer. Nuovo Cim 37, 658–663 (1965). https://doi.org/10.1007/BF02749861
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DOI: https://doi.org/10.1007/BF02749861