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在未来轻子对撞机上通过 $e^+e^- \to ZH$ 过程探测错位I型双希格斯二重态模型

Probing Mis-Aligned Type-I Two-Higgs-Doublet Model in $e^+e^- \to ZH$ at Future Lepton Colliders

Majid Hashemi

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中文总结 AI 辅助

该研究在未来轻子对撞机上,基于双希格斯二重态模型I型错位场景,分析e+e-→ZH过程中重CP偶希格斯态的WW和hh衰变通道,通过快速探测器模拟评估排除灵敏度,发现H→WW通道可在95%置信水平下排除|cβ-α|>0.1的较大参数空间。

中文摘要 AI 辅助

在双希格斯二重态模型(2HDM)框架内,对 $e^+e^- \to ZH$ 过程中希格斯产生的详细对撞机研究被呈现,特别强调了I型实现中的错位场景。该分析在未来 $e^+e^-$ 对撞机上进行,质心能量为 $\sqrt{s}=500$~GeV,积分亮度为 $10~\mathrm{ab}^{-1}$,考虑重希格斯质量范围 $160 \leq m_H \leq 400$~GeV。分析涵盖了具有非费米子衰变模式(如 $H\to WW$ 和 $H\to hh$)的重CP偶希格斯态,并包含了来自轻子性和不可见 $Z$ 玻色子衰变的末态。采用快速参数化探测器级模拟来评估选择效率、信号-背景区分度以及排除灵敏度。结果表明,在 $H\to WW$ 场景中,$|c_{\beta-\alpha}|>0.1$ 的值可以在 $95\\%$ 置信水平下在几乎整个 $1\leq\tan\beta\leq10$ 范围内被排除,而 $H\to hh$ 通道提供的灵敏度较低。

英文摘要

A detailed collider study of Higgs production in the process $e^+e^- \to ZH$ is presented within the framework of the Two-Higgs-Doublet Model (2HDM), with particular emphasis on mis-aligned scenarios in the Type-I realization. The analysis is performed at a future $e^+e^-$ collider with $\sqrt{s}=500$~GeV and an integrated luminosity of $10~\mathrm{ab}^{-1}$, considering heavy Higgs masses in the range $160 \leq m_H \leq 400$~GeV. The analysis covers heavy CP-even Higgs states with non-fermionic decay modes such as $H\to WW$ and $H\to hh$, and incorporates final states arising from leptonic and invisible $Z$ boson decays. Fast parametrized detector-level simulations are employed to evaluate selection efficiencies, signal--background discrimination, and exclusion sensitivities. It is shown that values of $|c_{β-α}|>0.1$ can be excluded at the $95\%$ confidence level over almost the entire range $1\leq\tanβ\leq10$ in the $H\to WW$ scenario, while the $H\to hh$ channel provides lower sensitivity.

发表机构

  • Department of Physics, College of Science, Shiraz University(设拉子大学理学院物理系)

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