Some features of the reaction pp $Yields$ $delta$$sup ++$(1236)n at 6 GeV/c

Approximately 12 000 examples of the reaction pp$Yields$$delta$$sup ++$(1236)n have been identified at 6 GeV/c in a spark-chamber experiment performed at the Argonne National Laboratory Zero Gradient Synchrotron. The experimental invariant-mass and momentum-transfer-squared distributions are in agreement with predictions of the Chew-Low one-pion-exchange model, suitably modified to account for form factors or absorption. The data have been extrapolated from the physical region to the pion pole. It is found that the Durr-Pilkuhn and Benecke-Durr models, in conjunction with quadratic extrapolations in t, reproduce the known on-mass-shell dependence of the cross section for the elastic $pi$$sup +$p scattering. (AIP)