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 14 TeV 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 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.
Keywords
Cite
@article{arxiv.1812.06217,
title = {Electroweak phase transition and Higgs phenomenology in the Georgi-Machacek model},
author = {Ruiyu Zhou and Wei Cheng and Xin Deng and Ligong Bian and Yongcheng Wu},
journal= {arXiv preprint arXiv:1812.06217},
year = {2019}
}
Comments
28 pages, 12 figures, comments welcome