TEST OF THE ISOSPIN INVARIANCE USING POLARIZATION EFFECTS IN SLOW ANTIPROTON ANNIHILATION, (P)OVER-BAR-]P+V(P(N))

The spin structure of the amplitudes for antiproton annihilation at re st, (p) over bar + N --> P + V, P = pi, eta; V = rho, omega, phi, is e stablished. The relation between symmetry properties of strong interac tion (isospin invariance and the invariance relative to charge conjuga tion) and the polarization effects in such reactions are derived. It i s demonstrated that the simplest polarization effects in (p) over bar + N --> P + V, namely, the elements of V-meson density matrix, are sen sitive to possible violation of the isospin invariance and C-invarianc e. The analysis of the spin structure of P-wave annihilation amplitude s is also presented.