Four-body integral equations are used to calculate dd→dd and dd→${\mathrm{p}}^3$H amplitudes using a single-term separable nucleon-nucleon potential in channels ${}_{}{}^1{}_{}{}^{}\mathrm{S}_0^{}{}_{}{}^{}$ and ${}_{}{}^3{}_{}{}^{}\mathrm{S}_1^{}{}_{}{}^{}$${\mathrm{-}}^3$${\mathrm{D}}_1$. First-order perturbation theory is used to include in the four-body kernel the contribution of d-wave two- and three-nucleon channel components that result from the tensor force. Cross sections and analyzing powers are calculated using all positive- and negative-parity four-body amplitudes with total angular momentum J≤4. Comparison with data is presented.

• Received 5 June 1989

DOI:https://doi.org/10.1103/PhysRevLett.63.2036