Nuclear shadowing in Glauber-Gribov theory with Q2-evolution

TL;DR

This paper investigates nuclear shadowing effects in deep inelastic scattering within the Glauber-Gribov framework, revealing significant modifications of structure functions at low-x and high Q2, using unitarized parton distributions.

Contribution

It extends the Glauber-Gribov model to include Q2-evolution and high Q2 regimes, providing new insights into nuclear shadowing effects in these kinematic regions.

Findings

Sizeable shadowing effects on $F_2^A$ and $F_L^A$ at low-x

Significant shadowing in high Q2 coherent diffraction

Discussion of model limitations and future extensions

Abstract

We consider deep inelastic scattering off nuclei in the Regge limit within the Glauber-Gribov model. Using unitarized parton distribution functions for the proton, we find sizeable shadowing effects on the nuclear total and longitudinal structure functions, $F_2^A$ and $F_L^A$, in the low-x limit. Extending a fan-diagram analysis for the large-mass region of coherent diffraction off nuclei to high Q2, we also find significant shadowing effects in this kinematical regime. Finally, we discuss shortcomings of our approach and possible extensions of the model to other kinematical regimes.