Spin effects in triangle graphs

The triangle graph describing elastic xA-scattering is considered. The decomposition of the triangle graph amplitude over the t-channel invariant amplitudes is presented. It is shown that taking spin effects into account results in an energy dependence of the t-channel invariant amplitudes. The exact expression for the invariant amplitudes is compared to the approximate ones. The effect of this energy dependence on the polarization of the emitted particles is investigated.