A simple model for the charm structure function of nuclei

In this paper, we have investigated the importance of quark charm in nuclearstructure functions in the color dipole model at small $x$. The charm structurefunction per nucleon $F_{2}^{cA}/A$ for light and heavy nuclei in a wide rangeof transverse separations $\mathrm{r}$ with renormalization and factorizationscales are considered. Bounds on the ratio $F^{cA}_{2}/AF^{A}_{2}$ for nucleiare well described with respect to the electron-ion future colliders kinematicrange, i.e, EIC and EIcC colliders.