论文标题
期待$ h \toμ^{+}μ^{ - } $测量精度，$ e^{+} e^{ - } \ to z（q \ bar {q}）H $生产
Expected $H\toμ^{+}μ^{-}$ measurement precision with $e^{+}e^{-}\to Z(q\bar{q})H$ production at the CEPC
论文作者
论文摘要
使用蒙特卡洛模拟事件对标准模型Higgs玻色子的Dimuon衰变进行搜索，以模拟数据对应于5.6 AB $^{ - 1} $对应于$ e^{+} e^{ - } $ collisions $ e^c collions $ e^{+c colivess $ g s s $ g sqr的圆形电子 - 孔子胶体检测器收集的5.6 ab $^{ - 1} $。本文研究$ e^{+}对应于19％的精度。背景蒙特卡洛统计波动的系统影响估计可以忽略不计。已经研究了测量准确性对CEPC检测器的MUON动量分辨率的依赖性。发现MUON动量分辨率必须大于204 MeV，以发现标称集成光度的$ H \toμM$过程。而且，如果分辨率比设计的参数差100％，则需要集成的光度大于7.2 Ab $^{ - 1} $才能达到5 $σ$的意义。
A search for the dimuon decay of the Standard Model Higgs boson is performed using the Monte Carlo simulated events to mimic data corresponding to an integrated luminosity of 5.6 ab$^{-1}$ collected with the Circular Electron-Positron Collider detector in $e^{+}e^{-}$ collisions at $\sqrt{s}=240$ GeV. The paper studies $e^{+}e^{-}\to ZH,\,Z\to q\bar{q},\,H\toμ^{+}μ^{-}$ process, and the expected significance considering only the data statistical uncertainty over the background-only hypothesis for a Higgs boson with a mass of 125 GeV is found to be 6.1$σ$, corresponding to the precision of 19%. The systematic impacts from the background Monte Carlo statistical fluctuations are estimated to be negligible. The dependence of the measurement accuracy on the muon momentum resolution of the CEPC detector has been investigated. It is found that the muon momentum resolution has to be better than 204 MeV to discover the $H\toμμ$ process at the nominal integrated luminosity. And if the resolution is 100% worse than the designed parameter, the integrated luminosity is needed to be greater than 7.2 ab$^{-1}$ to reach 5$σ$ significance.
