Zero-degree measurements of the inclusive reaction np→pX in the energy range 400 to 800 MeV

Differential cross sections dsup2sigma/dp dΩ have been measured near 00 for the inclusive reaction np→pX, where X represents all possible combinations of pions and nucleons. Proton momentum spectra have been measured at average incident-neutron-momentum values from 950 to 1430 MeV/c in 60-MeV/c steps. Experimental results are compared with a field-theoretical peripheral model based on one-pion and rho-meson exchange with nucleon-nucleon and nucleon-δ intermediate states. The predictions of the model are in excellent agreement with the data, indicative that the np→pX reaction is dominated by the pδsup0 channel over the whole energy range of measurements