"Figure 2" of "Search for a heavy resonance decaying into a Z and a Higgs boson in events with an energetic jet and two electrons, two muons, or missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

The product of signal acceptance and efficiency for signal events as a function of $m_{Z'}$ for the charged-lepton and neutrino channels in the SR. The efficiency is calculated with respect to Z boson decays to charged leptons and neutrinos for the charged-lepton and neutrino channels, respectively. For comparison, the results from the $\leq$ 1 b category of the previous CMS search in the ZH channel are shown as dashed lines.

信号区域（Signal Region，SR）中带电轻子通道和中微子通道的信号事件的信号接收度与效率的乘积，作为Z'玻色子质量$m_{Z'}$的函数。对于带电轻子通道和中微子通道，效率分别相对于Z玻色子衰变为带电轻子和中微子的过程进行计算。为便于比较，此前CMS实验在ZH通道搜索中≤1 b类别的结果以虚线显示。