We analyze polarization phenomena for pseudoscalar and vector mesons
production in nucleon-nucleon collisions. We identify three energy regions
corresponding to different physics and different approaches in the analysis of
polarization effects. In the threshold region, characterized by the S-wave
production for all final particles, the general symmetry properties of strong
interaction can be applied. The region of intermediate energies, T=2-4 GeV, is
characterized by the essential role of central i.e. non-peripheral collisions,
where only a small number of s-channel states with definite quantum numbers,
JP=1− and 2+, contribute. At higher energies, T ≥10 GeV, the
leading mechanism is the diffractive dissociation and it is especially
interesting for baryon spectroscopy. The transition to this region is an open
field for experimental research at the Nuclotron.Comment: 25 pages, 9 figures Int. Workshop on Relativistic Nuclear Physics
from Hundreds of MeV to TeV, Varna, Bulgaria, 10-16 September 200