Role of tensor forces in theHe4(d→,3He)3H reaction

Recent experimental polarization data on the ${}_{}{}^4{}_{}{}^{}\mathrm{He}$(d→${,}^3$He${)}^3$H reaction are analyzed. We performed a microscopic multichannel resonating group calculation and found sensitivity to the tensor force only for the tensor analyzing powers. In addition we fitted the experimental data by S-matrix elements and found good agreement between calculation and fit for the most important tensor-independent matrix elements and only fair agreement for the strongly tensor-dependent ones. Arguments for this finding are given.