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arXiv 1702.03554hep-ph
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多希格斯玻色子末态的新物理学

New Physics in multi-Higgs boson final states

Wolfgang Kilian, Sichun Sun, Qi-Shu Yan, Xiaoran Zhao, Zhijie Zhao

摘要:

我们探讨了在$100$ TeV强子对撞机的$2b2l^{\pm}4j+E\!\!\!/$衰变通道中发现三重希格斯信号的可能性。我们考虑了标准模型和一般的新物理学的贡献,描述了一个有效的拉格朗日,其中包括高维运营商。所选择的子集的运营商的动机复合希格斯和希格斯膨胀模型。在标准模型中,我们进行部分子级和探测器级分析。虽然部分子水平的结果是令人鼓舞的,探测器水平的结果表明,这种模式将是真正的挑战。然而,新的有效算子的相当大的贡献可以在很大程度上增加截面和/或修改希格斯玻色子在最终状态的运动学。考虑到单、双Higgs玻色子产生的限制,我们提出了新物理模型中的基准点,用于未来对撞机项目中三重希格斯玻色子终态的测量。

英文摘要:

We explore the potential for the discovery of the triple-Higgs signal in the $2b2l^{\pm}4j+E\!\!\!/$ decay channel at a $100$ TeV hadron collider. We consider both the Standard Model and generic new-physics contributions, described by an effective Lagrangian that includes higher-dimensional operators. The selected subset of operators is motivated by composite-Higgs and Higgs-inflation models. In the Standard Model, we perform both a parton-level and a detector-level analysis. Although the parton-level results are encouraging, the detector-level results demonstrate that this mode will be really challenging. However, sizable contributions from new effective operators can largely increase the cross section and/or modify the kinematics of the Higgs bosons in the final state. Taking into account the projected constraints from single and double Higgs-boson production, we propose benchmark points in the new physics models for the measurement of the triple-Higgs boson final state for future collider projects.

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