Bloom-Gilman duality of inelastic structure functions in nucleon and nuclei

The Bloom-Gilman duality of the inelastic structure function of the nucleon, the deuteron and light complex nuclei is investigated using available experimental data in the squared four-momentum transfer range from $0.3$ to $5 ~ (GeV/c)^2$. The results of the analysis suggest that the onset of the Bloom-Gilman local duality is anticipated in complex nuclei with respect to the case of the nucleon and the deuteron. A possible interpretation of this result in terms of a rescaling effect is discussed and it is argued that different rescalings for the nucleon elastic form factors and for the excitation of nucleon resonances in nuclei may not be excluded by present data.