Krauss-Kowalski Calculations of Nucleon-Deuteron Polarization

Nucleon-deuteron polarizations and differential cross sections have been calculated in the energy range from 11 to 23 MeV, with exactly the same approximation (the unitary first-order approximation) and exactly the same interactions and parameters as in the recent calculations of Krauss and Kowalski. All the results are entirely different, however, and in contrast to the previous results the calculated polarizations are in complete disagreement with experiment. It is pointed out that the procedure used in the previous calculations of cutting off the partial-wave expansion at $J=\frac{3}{2}$ is unsatisfactory, but this observation does not at all explain the differences between the results.