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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1311.2248hep-ex
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用$Z$的强子衰变模在未来$e^{+}e^{-}$对撞机上测量$σ_{Zh}$的总截面

A measurement of the total cross section of $σ_{Zh}$ at a future $e^{+}e^{-}$ collider using the hadronic decay mode of $Z$

Akiya Miyamoto

摘要:

本文研究了在未来的$e^+e^-$对撞机上利用$Z$的强子衰变模测量Higgs-strahlung过程$(σ_{Zh})$的总截面的可行性。为了测量$Z$强子衰变产生的反冲质量,利用ILC束流参数,对$\sqrt{s}=350$和500 GeV的ILD全探测器模拟产生的样品进行了简单的切割分析。在$350$ GeV,反冲质量分布中的一个凸起被重建,并且假设165 fb $^{-1}$数据和$e^-(e^+)$束偏振分别为-80%(+30%)和+80%(-30%),获得$Δσ_{Zh}/σ_{Zh}$ = 3.4%。在$500$ GeV,在反冲质量分布中没有看到明显的希格斯玻色子峰,然而,从事件的过量,假设500 fb $^{-1}$数据,$e^-(e^+)$束偏振为-80%(+30%),获得$Δσ_{Zh}/σ_{Zh}=3.9%$。

英文摘要:

A feasibility to use the hadronic decay mode of $Z$ for the model independant measurement of the total cross section of Higgs-strahlung process $(σ_{Zh})$ at a future $e^+e^-$ collider was studied. For the recoil mass measurement from hadronic decay of $Z$, a simple cut based analysis was applied on samples produced by the ILD full detector simulation at $\sqrt{s}=350$ GeV and 500 GeV using the ILC beam parameters. At $350$ GeV, a bump in the recoil mass distribution was reconstructed, and $Δσ_{Zh}/σ_{Zh}$ = 3.4% was obtained assuming 165 fb$^{-1}$ data with $e^-(e^+)$ beam polarization of -80%(+30%) and +80%(-30%), respectively. At $500$ GeV, clear Higgs boson peak in the recoil mass distribution was not seen, however, from the excess of the events, $Δσ_{Zh}/σ_{Zh}=3.9%$ was obtained assuming 500 fb$^{-1}$ data with $e^-(e^+)$ beam polarization of -80%(+30%).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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