TESTING NUCLEON STRANGENESS IN POLARIZATION EFFECTS FOR N-]D+ETA(P)

Charge symmetry of strong interaction results in a simplified spin str ucture of amplitude for n + p --> d + eta in ''orthogonal'' kinematics , where the eta-production angle is equal to 90 degrees in CMS. The pr esence of singlet and triplet amplitudes in such kinematics induces a rich set of different polarization observables, sensitive to the relat ive value of these amplitudes. This can be used to test a hypothesis o f singlet enhancement of eta-production in NN- and (N) over bar N-coll isions, due to a nonperturbative s (s) over bar-component of the nucle on with special polarization properties.