Coalescence parameter $B_2$ as a function of the transverse momentum per nucleon for different rapidity intervals. Data are compared to model predictions from Pythia 8.3 (left panel) and from a coalescence model used as afterburner of Epos 3 (right panel), shown as colored lines. Statistical and systematic uncertainties on the data points are represented by vertical bars and boxes, respectively. The statistical uncertainties of the data points are smaller than the size of the markers in the reported scale and, hence, not visible.