Experimental measurements in pA collisions indicate no D meson suppression ($R_{ \rm pPb} \sim 1$) but a surprisingly large $v_2$. To better understand these results we propose a system size scan at the LHC involving $^{ 16}$OO, $^{ 40}$ArAr, $^{ 129}$XeXe and $^{ 208}$PbPb collisions. Using Trento+ v-USPhydro+DAB-MOD to make predictions, we find that the $R_{ \rm AA}$ tends towards unity when the system size is decreased, but nonetheless, in the most central collisions $v_2\{ 2\}$ is almost independent of the colliding system. These results are analyzed in light of path length and initial eccentricity variations.
Categories: nucl-th hep-ex hep-ph