Deuteron $P$ wave in elastic backward proton-deuteron scattering

The elastic backward proton-deuteron scattering is analyzed within a covariant approach based on the invariant expansion of the reaction amplitude. The relativistic invariant equations for all the polarization observables are presented. Within the impulse approximation the relation of the tensor analyzing power $T_{20}$ and the polarization transfer ${\kappa }_0$ to the P-wave components of the deuteron wave function is found. Comparison of the theoretical calculations with the experimental data is presented. Experimental verification of the reaction mechanism by constructing some combinations of different observables is suggested.