Difference of neutron and proton analyzing powers in elasticN−dscattering between 5 and 14 MeV

The effect of Coulomb distortion on the proton analyzing powers in elastic $p-d$ scattering is calculated by an effective two-body approximation that involves $n-d$ on-shell information only. Varying the $n-d$ input information hardly affects the charge symmetric $p-d$ predictions. The calculated difference of the neutron and proton analyzing powers is significant at all but the very backward angles. Around the peak value of the analyzing power the difference is mainly due to Coulomb distortion, whereas in forward direction pure Coulomb effects dominate. The agreement with the measured analyzing power difference at 10 MeV is good but only fair 14 MeV, where the experimental situation might not be fully settled.