Dispersion Relations and Charge Exchange Reaction π-p→ π0n at High Energies
Solov'ev L.D., Shchelkachev A.V.
It is shown that to obtain agreement with experiment it is necessary to make one substraction in the dispersion relations for the amplitude of the charge exchange π~ρ тг°п. The real part of e χ the amplitude and da /dt tend in this case to constant values at t 0 and Ε °°, thus contradicting the model of complex angular momenta.