  Advantages of the amplitude method for the vector-meson-production
description in respect of the spin-density-matrix-element (SDME) method are
discussed. It is shown that for any nonzero amplitudes the angular distribution
of final particles is non-negative. The exact formula for $R = \frac{d
\sigma_L}{d t}/\frac{d \sigma_T}{d t}$ in terms of the SDMEs for spinless
targets and the new approximate formula for nucleons are presented.
