One-pion-exchange potential deuteron

The one-pion-exchange potential which depends on a single (cutoff) parameter is shown to provide an adequate description of most of the deuteron observables, provided that the parameter is adjusted to produce the correct binding energy. In particular, the tensor observables $\eta$ and $Q$ are within a few percent of their experimental values. Substituting this potential for the ${}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}-{}_{}{}^3{}_{}{}^{}D_1^{}{}_{}{}^{}$ potential of a super-soft-core model in a Faddeev calculation of the ${}_{}{}^3{}_{}{}^{}\mathrm{H}$ ground state increases the binding energy by only 0.1 MeV.