  The elastic backward proton-deuteron scattering is analyzed within a fully
covariant approach based on the invariant expansion of the reaction amplitude.
The method of calculation of any observables for any reaction mechanism is
developed. The cross section and spin observables, like tensor analyzing power
and polarization transfer coefficient etc., are investigated in explicit form
within framework of the impulse approximation using different kinds of the
relativistic deuteron wave function (DWF) with P-wave components. Our results
of numerical calculation for complete set of polarization observables are
compared with the experimental data and other calculations performed within
both the non-relativistic and relativistic approaches. An experimental
verification of the reaction mechanism is suggested by constructing some
combinations of different observables.
