I present results from our recent leading twist QCD analysis of nuclear shadowing and contrast them with predictions using the eikonal model. By exploiting QCD factorisation theorems, the leading twist approach employs diffractive parton distributions, extracted from diffractive DIS measurements at HERA, to calculate the nuclear shadowing correction on the parton level. Large nuclear shadowing effects are found for the gluon channel which are reflected in the predictions for F_L^A.

PACS numbers: 11.10.Hi, 11.30.Ly, 12.38.Bx