Left-right asymmetry of nuclear shadowing in charged current DIS

We study the shadowing effect in highly asymmetric diffractive interactions of left- and right-handed W-bosons with atomic nuclei. The target nucleus is found to be quite transparent for the charmed-strange Fock component of the light-cone W+ in the helicity state λ=+1 and rather opaque for the cs¯ dipole with λ=−1. The shadowing correction to the structure function ΔxF3=xF3νN−xF3ν¯N extracted from νFe and ν¯Fe data is shown to make up about 20% in the kinematical range of CCFR/NuTeV.