Electroweak phase transition and Higgs phenomenology in the Georgi-Machacek model
Electroweak phase transition and Higgs phenomenology in the Georgi-Machacek model
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Georgi-Machacek 模型中的电弱相变和希格斯现象学
DOI：
10.1007/jhep01(2019)216
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Wu Yongcheng
中科院分区：
文献类型：
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作者：
Zhou Ruiyu;Cheng Wei;Deng Xin;Bian Ligong;Wu Yongcheng
在这项工作中，我们用george - machacek模型进行了电弱相变的研究。我们研究了一步和两步强一阶电弱相变（SFOEWPT）。SFOEWPT可行参数空间可以在未来的14TeV LHC、HL-LHC和ILC中进行测试。LHC希格斯信号强度测量严重限制了SFOEWPT的有效参数空间，在α ~ 0附近的同位旋双重态和同位旋三重态标量的中性场之间的混合角的微小区域可以允许两步SFOEWPT发生。三重态真空期望值（VEV）对于SFOEWPT和相关的希格斯现象学都是至关重要的。通过在对撞机上进行三重希格斯耦合搜索和低质量双荷希格斯搜索，两步SFOEWPT可以与一步SFOEWPT区分。
In this work, we perform the electroweak phase transition study with the Georgi-Machacek model. We investigate both the one-step and two-step strong first order electroweak phase transition (SFOEWPT). The SFOEWPT viable parameter spaces could be tested by the future 14TeV LHC, HL-LHC, and ILC. The LHC Higgs signal strength measurements severely bound the SFOEWPT valid parameter spaces, a tinny region of the mixing angle between the neutral fields of the isospin-doublet and isospin-triplet scalars around α∼ 0 can allow the two-step SFOEWPT to occur. The triplet vacuum expectation value (VEV) is crucial for both SFOEWPT and related Higgs phenomenology. The two-step SFOEWPT can be distinguished from the one-step SFOEWPT through the triple Higgs coupling searches and the low mass doubly charged Higgs searches at colliders.