通过缪子对撞机上的矢量玻色子融合探测惰性双希格斯二重态模型的惰性标量扇区
Probing the Inert Scalar Sector of the Inert Doublet Model via Vector-Boson Fusion at a Muon Collider
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中文总结 AI 辅助
本文研究未来高能缪子对撞机通过矢量玻色子融合过程探测惰性双希格斯二重态模型惰性标量扇区的灵敏度，发现截面随能量显著增加，10和20 TeV对撞机阶段成为有力探针。
中文摘要 AI 辅助
我们通过一组全面的 $2\to4$ 电弱规范玻色子融合过程，研究未来高能缪子对撞机（MuCs）对惰性双希格斯二重态模型（IDM）惰性标量扇区的灵敏度。标量谱由两个CP偶中性标量 $h$ 和 $H$、一个CP奇中性标量 $A$ 以及一对带电标量 $H^\pm$ 组成。我们假设中性标量 $H$ 是最轻的惰性态，并作为暗物质（DM）候选者，而观测到的 $125$ GeV希格斯玻色子被认定为类标准模型二重态的标量。我们考虑带电希格斯对产生：由WW融合诱导的 $\mu^+\mu^-\to H^+H^-\nu\bar{\nu}$，以及伴随道：由 $WZ$ 和 $W\gamma$ 融合诱导的 $\mu^+\mu^-\to HH^\pm\mu^\mp\nu$ 和 $\mu^+\mu^-\to AH^\pm\mu^\mp\nu$。由于其矢量玻色子融合（VBF）起源，相应的截面随对撞机能量显著增加，使其特别适合在高能MuCs上进行探索。我们首先研究 $2\to 2$ 子过程 $WW\to H^+ H^-$ 和 $WV\to H^+ S_i$，其中 $V=Z, \gamma$，$S_i=H$ 或 $A$，并确定贡献图之间的相消干涉。在施加理论一致性要求和当前实验约束（包括来自暗物质和对撞机搜索的约束）之后，我们在 $\sqrt{s}=3$、$10$ 和 $20$ TeV下评估相应的信号率。我们进一步进行探测器级蒙特卡洛分析，并结合基于截断的信号-本底选择。我们的结果表明，对惰性标量产生的灵敏度随碰撞能量显著增加，确立10和20 TeV MuCs阶段作为探测IDM惰性标量扇区的有力工具。
英文摘要
We investigate the sensitivity of a future high-energy muon collider (MuCs) to the inert scalar sector of the Inert Doublet Model (IDM) through a comprehensive set of $2\to4$ electroweak gauge-boson fusion processes. The scalar spectrum consists of two CP-even neutral scalars: $h$ and $H$, one CP-odd neutral scalar $A$, and a pair of charged scalars $H^\pm$. We assume the neutral scalar $H$ to be the lightest inert state and the dark matter (DM) candidate, while the observed $125$~GeV Higgs boson is identified with the scalar of the Standard Model-like doublet. We consider charged Higgs pair production: $μ^+μ^-\to H^+H^-ν\barν$ induced by WW fusion, as well as the associated channels: $μ^+μ^-\to HH^\pmμ^\mpν$ and $μ^+μ^-\to AH^\pmμ^\mpν$, induced by $WZ$ and $Wγ$ fusion. Owing to their Vector Boson Fusion (VBF) origin, the corresponding cross sections increase significantly with collider energy, making them particularly well suited for exploration at a high-energy MuCs. We first study the $2\to 2$ subprocesses $WW\to H^+ H^-$ and $WV\to H^+ S_i$, $V=Z, γ$ and $S_i=H$ or $A$ and establish the destructive interference among the contributing diagrams. After imposing theoretical consistency requirements and current experimental constraints, including those from DM and collider searches, we evaluate the corresponding signal rates at $\sqrt{s}=3$, $10$, and $20$~TeV. We further perform a detector-level Monte Carlo analysis combined with a cut-based signal-background selection. Our results demonstrate that the sensitivity to inert scalar production increases significantly with collision energy, establishing the 10 and 20~TeV MuCs stages as powerful probes of the IDM inert scalar sector.
发表机构
- FST, Abdelmalek Essaadi University（阿卜杜勒马利克·埃萨迪大学）
- Faculty of Sciences, Ibnou Zohr University（伊本·祖赫尔大学）
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