Shedding light on the electroweak phase transition from exotic Higgs boson decays at the lifetime frontiers

Liu, Wei; Yang, AiGeng; Sun, Hao

doi:10.1103/physrevd.105.115040

Phys. Rev. D

2022

DOI: 10.1103/physrevd.105.115040

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Shedding light on the electroweak phase transition from exotic Higgs boson decays at the lifetime frontiers

Wei Liu

AiGeng Yang

Hao Sun

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2024

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Cited by 2 publications

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Direct production of light scalars in the type-I two-Higgs-doublet model at the lifetime frontier of the LHC

Liu,

Wang,

Zhang

2024

Phys. Rev. D

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A light pseudoscalar A in the sufficient large tanβ region of type-I two-Higgs-doublet model can be naturally a long-lived particle. We focus on H±A, HA, and AA pair productions via the electroweak processes mediated by the bosons at the LHC, including pp→W±/Z→H±/HA and pp→h→AA at the 14 TeV LHC. The possibility of probing A as a LLP at the FASER-2, FACET, MoEDAL-MAPP-2, and MATHUSLA is discussed. We find that FASER-2 fails to probe any parameter space within 0.2 GeV<mA<10 GeV for all the considered processes. For 130<mH±=mH<400 GeV, FACET, MoEDAL-MAPP-2, and MATHUSLA can probe tanβ≲104−6 for mA≲3 GeV, and tanβ≲106−8 for 3 GeV≲mA<10 GeV from pp→W±/Z→H±/ZA processes. And pp→h→AA process covers similar parameter space. All processes can surpass the current limits. Published by the American Physical Society 2024

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Direct production of light scalars in the type-I two-Higgs-doublet model at the lifetime frontier of the LHC

Liu,

Wang,

Zhang

2024

Phys. Rev. D

View full text Add to dashboard Cite

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Probing radiative electroweak symmetry breaking with colliders and gravitational waves

Liu,

Xie

2024

Phys. Rev. D

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Radiative symmetry breaking provides an appealing explanation for electroweak symmetry breaking and addresses the hierarchy problem. We present a comprehensive phenomenological study of this scenario, focusing on its key feature: the logarithmic-shaped potential. This potential gives rise to a relatively light scalar boson that mixes with the Higgs boson and leads to first-order phase transitions (FOPTs) in the early Universe. Our study includes providing exact and analytical solutions for the vacuum structure and scalar interactions, classifying four patterns of cosmic thermal history, and calculating the supercooled FOPT and gravitational waves (GWs). A detailed treatment of the FOPT dynamics reveals that an ultra-supercooled FOPT does not always imply strong GW signals, due to its short duration. By combining future collider and GW experiments, we can probe the conformal symmetry breaking scales up to 105–108 GeV. Published by the American Physical Society 2024

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Shedding light on the electroweak phase transition from exotic Higgs boson decays at the lifetime frontiers

Cited by 2 publications

References 93 publications

Direct production of light scalars in the type-I two-Higgs-doublet model at the lifetime frontier of the LHC

Direct production of light scalars in the type-I two-Higgs-doublet model at the lifetime frontier of the LHC

Probing radiative electroweak symmetry breaking with colliders and gravitational waves

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