"Figure 12" of "Nuclear-Modification Factor for Open-Heavy-Flavor Production at Forward Rapidity in Cu+Cu Collisions at sqrt(s_NN)=200 GeV"

c$\bar{c}$ production cross section as a function of rapidity in $p$+$p$ collisions, measured using semileptonic decay to electrons (closed square) and to muons (closed circle).

质子-质子（$p$+$p$）碰撞中粲夸克-反粲夸克对（$car{c}$）的产生截面随快度的变化关系，通过半轻子衰变到电子（闭合方形）和缪子（闭合圆形）的过程进行测量。