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THE ELEMENTARY p ( p , p ′ π + ) n REACTION

A detailed study of the elementary p(p,p ′ π +)n reaction is presented using the delta isobar model. In this model, in the first step one of the two protons in the initial state gets excited to ∆. This, in the second step, decays into a nucleon and a pion. For the pp→N∆ step the parametrized form of the DWBA t-matrix of Jain and Santra, which reproduces most of the available data on pp→n∆ ++ , is used. The cross-sections studied include the outgoing proton momentum spectra in coincidence with the pion, the outgoing pion momentum spectra and the integrated total cross-section. We find that all the calculated numbers are in good agreement with the corresponding measured cross sections.