Absh'acL In the framework of the collective model the longirudinal, transverse and toroidal multipoles corresponding to the excitations of low-lying levels in the ground-state band of several even-even nuclei are computed by inelastic electron scattering (4). In connection wilh these transitions a new quantity, which accounts for the deviations from the Sieges theorem, is introduced in the framework of the Riemann rotational model with non-vanishing vorticity. Inelastic differential cross sections calculated at backscattering angles show the dominance of toroidal form factors over a broad range of momenmm bdnsfer. P G H Sandars, J D Walecka, E Moya de Guerra, N Lo Judice and R Liotta. The assistance of A Andronic is acknowledged,
The second moments of the quark structure functions of the longitudinally M L ρ and transversally M T ρ polarized ρ-mesons are calculated in the framework of QCD sum rules in external fields. The operators of dimension 4 and 6 are taken into account. The results are (µ 2 = 1 GeV 2 ): M L ρ = 0.84 ± 0.08, M T ρ = 0.5 ± 0.1. The large difference between the values of M L ρ and M T ρ indicates that the ρ-meson polarization strongly influences the internal structure. In particular, in the case of the longitudinally polarized ρ-meson the gluon sea is found to be strongly suppressed, it is less than 20 ÷ 25%, whereas in usual hadron case -about 40 ÷ 50%.
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