Spin-1 mesons are self-analyzing with respect to their tensor polarization,
and spin-2 mesons are self-analyzing with respect to their rank-2 and thei
r rank-4 polarization. Also spin-3/2 baryons are self-analyzing with respec
t to their rank-2 polarization. These properties make, for example, spin-co
rrelations involving the vector-meson's vector polarization inaccessible di
rectly with present experimental techniques.