"Figure 3 ($\alpha_\mathrm{3D}$)" of "Search for new particles decaying to a jet and an emerging jet"

Distributions of $\alpha_\mathrm{3D}$ for background (black) and for signals with a mediator mass of 1 TeV and a dark pion mass of 5 GeV for dark pion proper decay lengths ranging from 1 to 300 mm.$oldsymbol{alpha}_mathrm{3D}$的分布包含本底（黑色曲线），以及中介子质量为1太电子伏特（TeV）、暗π子（dark pion）质量为5吉电子伏特（GeV）且暗π子固有衰变长度介于1至300毫米的信号的分布。