Abstract
We combine the expectation that diagrams which generate Regge cuts must contain third double-spectral functions with the requirements of exchange degeneracy to arrive at a selection rule for Regge cuts. This rule prohibits Regge-Regge cuts from contributing to KN scattering, and we speculate that this prohibition might explain the observation that the K+p total cross-section is such a remarkably constant function of energy, and that the cross-sections for KN andK-N charge-exchange scattering rapidly become equal as the energy increases.
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