Diffraction dissociation of neutrons into (pπ−) on protons in the momentum range 35 to 65 GeV/c☆

The diffraction dissociation reaction n + p → (pπ−) + p was studied at the Serpukhov accelerator neutron beam in the momentum range 35–65 GeV/c in an electronics experiment. The differential cross sections of the reaction are analysed and presented in the five-dimensional phase space (pn, m∗, t, cosθ∗, φ∗). The backward peak observed in the distribution over if cosθin GJ ∗ in the Gottfried-Jackson frame of if(pπ) is interpreted as a baryon-exchange effect. The angular distribution of the (pπ−) system is compared with Deck-type models.