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arXiv 1909.08032hep-phhep-ex
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CLIC三能级产生$Hν\barν$中CP破坏的Higgs规范玻色子耦合

CP-violating Higgs-gauge boson couplings in $Hν\barν$ production at three energy stages of CLIC

O. Karadeniz, A. Senol, K. Y. Oyulmaz, H. Denizli

摘要:

通过$e^+e^-\toν\barν H$过程的CP违反六维运营商的唯象研究进行了在CLIC的所有能量阶段,使用更新的基线积分亮度的模型无关的标准模型有效场理论框架。所有信号和相关背景事件都在MadGraph中生成,并通过PYTHIA进行部分子簇射和部分子水平的强子化。通过Delphes中的调谐CLIC检测器卡来考虑检测器效应。由于我们重建的希格斯玻色子从一对b-喷流,限制CP违反六维耦合得到三个$b$标记的工作点:紧,中,松定义在CLIC Delphes卡CLIC的所有三个能量阶段。我们最好的95 \% C.L. $\tilde c_{HW}$和$\tilde c_{HB}$在松散工作点(90% b-标记效率)的极限分别为$[-7.0\times10^{-3};7.0\times10^{-3}]$和$[-3.0\times10^{-2};3.0\times10^{-2}]$,在CLIC的3 TeV能量级,积分光度为5.0 ab $^{-1}$。考虑到来自可能的实验源的0.3%的系统不确定度,将这些耦合的限制因子设为2。

英文摘要:

A phenomenological study of CP-violating dimension-six operators via the $e^+e^-\toν\barν H$ process is performed in a model-independent Standard Model effective field theory framework at all energy stages of CLIC using the updated baseline integrated luminosities. All signal and relevant background events are generated in MadGraph and passed through PYTHIA for parton showering and hadronization at parton level. Detector effects are considered via tuned CLIC detector cards in Delphes. Since we reconstruct the Higgs boson from a pair of b-jets, limits on CP-violating dimension-six couplings are obtained at three $b$-tagging working points: tight, medium and loose defined in the CLIC Delphes card for all three energy stages of CLIC. Our best 95 \% C.L. limits at the loose working point (90 \% b-tagging efficiency) on $\tilde c_{HW}$ and $\tilde c_{HB}$ are $[-7.0\times10^{-3};7.0\times10^{-3}]$ and $[-3.0\times10^{-2};3.0\times10^{-2}]$, respectively at the 3 TeV energy stage of CLIC with an integrated luminosity of 5.0 ab$^{-1}$. Considering a 0.3 \% systematic uncertainty from possible experimental sources worsens the limits on these couplings by a factor of two.

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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