Meson production in pd → 3HeX reaction in two-step model

The differential cross sections of pd → 3HeX reactions, where X=η, η1, ω, φ, are calculated on the basis of a two-step mechanism involving the subprocesses pp → dπ+ and π+n → pX. it is shown that the two-step model describes well the form of energy dependence of available experimental cross sections above thresholds at the final c.m.s. momentum p*=0-0.5 GeV/c for the ω meson as well as the ratios R(η1/η) and R(φ/ω). These results are obtained under the assumption that the singlet part of the pp → dπ+ amplitude dominates in the forward-backward direction. The spin-spin correlation parameters are predicted for the reaction p→s→ → 3HeX with polarized colliding particles