Nucleon-Nucleon Scattering in a Three Dimensional Approach
  The nucleon-nucleon (NN) t-matrix is calculated directly as function of two vector momenta for different realistic NN potentials. To facilitate this a formalism is developed for solving the two-nucleon Lippmann-Schwinger equation in momentum space without employing a partial wave decomposition. The total spin is treated in a helicity representation. Two different realistic NN interactions, one defined in momentum space and one in coordinate space, are presented in a form suited for this formulation. The angular and momentum dependence of the full amplitude is studied and displayed. A partial wave decomposition of the full amplitude it carried out to compare the presented results with the well known phase shifts provided by those interactions. 
I. Fachruddin (1), Ch. Elster (2), W. Gl\"ockle (1) ((1) Institute for   Theoretical Physics II, Ruhr-University Bochum; (2)...