Slow-proton production from neutron targets at 100 and 400 GeV/ c

We study the production of slow protons from neutron targets in the reaction p+n ..-->.. p+X at 100 and 400 GeV/c and in the reaction ..pi../sup +/+n ..-->.. p+X at 100 GeV/c in the kinematic region vertical-bartvertical-bar < 1.0 GeV/sup 2/. The data are observed to scale as a function of M/sup 2//s and t. We extract an effective Regge trajectory from the pn data of ..cap alpha../sub eff/ (t) = (0.26 +- 0.04)+(1.07 +- 0.11) t and obtain a similar result with the ..pi../sup +/n data. We conclude that Reggeized one-pion exchange alone is not sufficient to describe these reactions.