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

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

Abstract 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 I...

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Bibliographic Details
Main Authors: Ruiyu Zhou, Wei Cheng, Xin Deng, Ligong Bian, Yongcheng Wu
Format: Article
Language:English
Published: SpringerOpen 2019-01-01
Series:Journal of High Energy Physics
Subjects:
Beyond Standard Model
Higgs Physics
Thermal Field Theory
Online Access:http://link.springer.com/article/10.1007/JHEP01(2019)216
Description
Summary:Abstract 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.
ISSN:1029-8479

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