Related paper J/$ψ$ production at midrapidity in p$-$Pb collisions at $\sqrt{s_{\rm NN}} = 8.16$ TeV Acceptance times efficiency of the TRD trigger with the $p_{\rm T}$ threshold at 2 GeV/$c$ for single electrons (left) and single positrons (right) obtained from data and MC simulations. See text for details. [png] [pdf] [eps][png] [pdf] [eps]