Nuclear shadowing in neutrino-nucleus deeply inelastic scattering

Abstract

In the framework of the collinear factorized pQCD approach we calculate the small-$x_B$ process-dependent nuclear modification to the structure functions measured in neutrino-nucleus deeply inelastic scattering. We include both heavy quark mass corrections $(M^2/Q^2)$ and resummed nuclear-enhanced dynamical power corrections in the quantity $({\xi }^2/Q^2)(A^{1/3}-1)$ with ${\xi }^2$ evaluated to leading order in ${\alpha }_s$. Our formalism predicts a measurable difference in the shadowing pattern of the structure functions $F_2^A(x_B,Q^2)$ and $F_3^A(x_B,Q^2)$ and a significant low- and moderate-$Q^2$ modification of the QCD sum rules. We also comment on the relevance of our results to the NuTeV extraction of ${\sin }^2{\theta }_W$.

arXiv comment7 pages, 4 figures, RevTeX 4

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