Summary
The singularities present on the physical sheet in a partical-wave projection of the five-point function, due to normal thresholds in crossed channels, are determined. The problem of obtaining cut-plane analyticity in a single variable for the partial-wave amplitude is discussed.
Riassunto
Si determinano le singolarità insorgenti in seguito alla proiezione sul foglietto fisico di un’onda parziale della funzione di cinque punti, derivante da soglie normali in canali incrociati. Si discute il problema di ottenere l’analiticità del piano di taglio in una sola variabile per l’ampiezza dell’onda parziale.
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References
D. Branson, P. V. Landshoff andJ. C. Taylor:Phys. Rev.,132, 902 (1963).
P. V. Landshoff andS. B. Treiman:Nuovo Cimento,19, 1249 (1961).
See, for example,R. J. Eden in 1961Brandeis Lectures in Theoretical Physics (New York, 1962).
T. T. Wu:Phys. Rev.,123, 678 (1961).
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The research reported in this document has been sponsored in part by the Air Force Office of Scientific Research, OAR, under Grant AF EOAR 63-79 with the European Office of Aerospace Research, United States Air Force.
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Cordes, J.G. Analytic properties of partial-wave amplitudes for production processes. Nuovo Cim 39, 157–168 (1965). https://doi.org/10.1007/BF02814264
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DOI: https://doi.org/10.1007/BF02814264