Journal of High Energy Physics

, 2019:216 | Cite as

Electroweak phase transition and Higgs phenomenology in the Georgi-Machacek model

  • Ruiyu Zhou
  • Wei Cheng
  • Xin Deng
  • Ligong BianEmail author
  • Yongcheng Wu
Open Access
Regular Article - Theoretical Physics


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.


Beyond Standard Model Higgs Physics Thermal Field Theory 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.Department of PhysicsChongqing UniversityChongqingChina
  2. 2.Department of PhysicsChung-Ang UniversitySeoulKorea
  3. 3.Ottawa-Carleton Institute for PhysicsCarleton UniversityOttawaCanada

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