The coalescence parameter $B_4$ as a function of $p_{\rm T}/A$, calculated from the averaged ${}^{4}$He and ${}^{4}\overline{{\rm He}}$ spectra and the protons from [106]. Statistical uncertainties are indicated by the vertical lines and the boxes correspond to the systematic uncertainties. The blue dashed line and the full black line indicate the values for the SHM combined with blast-wave $p_{\rm T}$ shapes and the coalescence predictions from Refs. [86,87], respectively.