A distorted wave impulse approximation formalism is described for (${\pi }^{+}$,2p) reactions. The reaction is assumed to proceed via absorption on a deuteron-like p-n pair projected from shell-model wave functions. The spin dependence of this primary interaction is assumed to be dominated by s-wave Δ-nucleon terms. Spin-orbit distortions of the emitted protons, and the coherent addition of different orbital angular momentum transfers, L, are properly taken into account. For L=2, the calculations show a significant dependence on the total angular momentum transfer, J${=1\mathrm{}}^{+}$, $2^{+}$, or $3^{+}$. These new calculations are compared with experimental data for the ${}_{}{}^{16}{}_{}{}^{}({\pi }^{+}$,2p${)}^{14}$N reaction.

• Received 9 November 1988

DOI:https://doi.org/10.1103/PhysRevC.39.957