R ratios and moments of nuclear structure functions

We study implications of a model which links nuclear and nucleon structure functions. For this model, computed Callen-Gross functions κ^A(x,Q²)=2xF₁^A(x,Q²)/F₂^A(x,Q²) are for finite Q² close to their asymptotic value 1. Using those κ, we compute R ratios for Q²≳5GeV². We review approximate methods for the extraction of R from inclusive scattering and EMC data. We also calculate ratios of moments of F_k^A and find these to describe the data and in particular their Q² dependence. The above observables, as well as inclusive cross sections, are sensitive tests for the underlying relation between nucleonic and nuclear structure functions. In view of the overall agreement, we speculate that the above relation effectively circumvents a QCD calculation.