It is shown that the two-step model of the reaction pd —► He Χ (X ■ 17₁ fj' ,ω, φ), involving the subprocesses pp —» <br+ and ιτ+τν —> Xp allows to explain the form of energy dependence of experimental cross sections above the thresholds under assumption that the singlet part of the pp —♦ amplitude dominates. The spin-spin asymmetry for the reaction dp —>^HcX has been found to be ~ —1 in the forward-backward approximation.