| Summary: | Abstract The production of unstable particles on different nuclei provides the possibility to determine the total cross section of the interaction of vector mesons $$V=\rho ,\omega ,\varphi , K^{*0}(892),J/\psi $$ V = ρ , ω , φ , K ∗ 0 ( 892 ) , J / ψ etc. with nucleons. This interaction is defined by a set of amplitudes that correspond to the transverse (helicity $$\lambda =\pm 1$$ λ = ± 1 ) or longitudinal ( $$\lambda =0$$ λ = 0 ) polarization of the vector meson. The total cross section for the interaction of transversely polarized vector mesons with nucleon $$\sigma _T=\sigma (V_T N)$$ σ T = σ ( V T N ) has been extracted from the coherent photoproduction of vector mesons off nuclei, while the vector meson production in charge exchange reactions as $$\pi ^\pm (K^\pm )+A\rightarrow V^0(K^{*0})+A'$$ π ± ( K ± ) + A → V 0 ( K ∗ 0 ) + A ′ provides the unique opportunity to obtain the not yet measured total cross section for longitudinally polarized vector meson interacting with nucleon $$\sigma _L=\sigma (V_L N)$$ σ L = σ ( V L N ) . We shortly discuss the importance of the knowledge of $$\sigma _L$$ σ L and possibility to extract its value from experiments on nuclear target.
|
|---|