A proof of the existence of functions that satisfy exactly both crossing and unitarity (II) charged pions. No subtractions

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The contraction mapping principle is used to show that there exist pion-pion scattering amplitudes that satisfy the Mandelstam representation with full crossing symmetry between the three channels, elastic unitarity between the elastic and inelastic thresholds, and the inelastic unitarity inequalities above the latter.
Original languageEnglish
Pages (from-to)377-390
Number of pages14
JournalNuclear Physics B
VolumeB 8
Issue number2
Publication statusPublished - 1968
Externally publishedYes

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