Consistency of gauged two Higgs doublet model: gauge sector

Cheng-Tse, Huang,; Ramos, Raymundo; Tran, Van Que; Tsai, Yue-Lin Sming; Yuan, Tzu-Chiang

doi:10.1007/jhep09(2019)048

Cited by 14 publications

(31 citation statements)

References 66 publications

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“…In our case, we will not keep v Φ fixed. Due to Z 0 search constraints [35], we start our scan range at v Φ ¼ 20 TeV. Considering the energy scale for future colliders, we scan v Φ up to 100 TeV.…”

Section: A Methodologymentioning

confidence: 99%

“…(6) of Ref. [35]. Note that the photon A remains the same between the intermediate states V 0 Z and the mass eigenstates.…”

Section: Gauge Bosonsmentioning

confidence: 96%

“…As noted in Ref. [35], one can justify the parameter choice M Y ¼ 0 by considering the electric charges of the fermions. Otherwise, the neutrinos would not be neutral and all the SM electric charges would receive a correction that grows with M Y .…”

Section: Gauge Bosonsmentioning

confidence: 99%

“…3, the DM pairs are mainly produced in the Feynman diagrams with the exchanges of Z 2 -even Higgs bosons and neutral gauge bosons in the G2HDM. For numerical study, we take the parameters allowed by EWPT [35] and the XENON1T constraints (to be discussed in Sec. V) and find out that the cross sections are far below the current limits set by ATLAS [70] and CMS [71] Collaborations at the LHC.…”

Section: Monojet Searchmentioning

confidence: 99%

“…In a recent study, it has been determined that G2HDM has a viable scalar sector parameter space [34], compatible with vacuum stability and perturbative unitarity conditions, as well as Higgs phenomenology constraints from the LHC. The gauge sector is constrained by electroweak precision tests (EWPT) [35], setting limits on the masses of the new gauge bosons and the gauge sector parameter space. It is precisely these two recent studies on the scalar and gauge sectors constraints (SGSC) that we will take as starting point for our study, thus ensuring that the final constrained parameter space is consistent with previous studies and that our result has a stronger relevance.…”

Section: Introductionmentioning

confidence: 99%

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Complex scalar dark matter in the gauged two-Higgs-doublet model

et al. 2020

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The complex scalar dark matter (DM) candidate in the gauged two-Higgs-doublet model, stabilized by a peculiar hidden parity (h parity), is studied in detail. We explore the parameter space for the DM candidate by taking into account the most recent DM constraints from various experiments, in particular, the PLANCK relic density measurement and the current DM direct detection limit from XENON1T. We separate our analysis in three possible compositions for the mixing of the complex scalar. We first constrain our parameter space with the vacuum stability and perturbative unitarity conditions for the scalar potential, LHC Higgs measurements, plus Drell-Yan and electroweak precision test constraints on the gauge sector. We find that DM dominated by composition of the inert doublet scalar is completely excluded by further combining the previous constraints with both the latest results from PLANCK and XENON1T. We also demonstrate that the remaining parameter space with two other DM compositions can be further tested by indirect detection like the future Cherenkov Telescope Array gamma-ray telescope.

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Section: A Methodologymentioning

confidence: 99%

“…(6) of Ref. [35]. Note that the photon A remains the same between the intermediate states V 0 Z and the mass eigenstates.…”

Section: Gauge Bosonsmentioning

confidence: 96%

Section: Gauge Bosonsmentioning

confidence: 99%

Section: Monojet Searchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Complex scalar dark matter in the gauged two-Higgs-doublet model

et al. 2020

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Charged lepton flavor violating radiative decays li → ljγ in G2HDM

Tran

Yuan

2023

J. High Energ. Phys.

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We compute the electromagnetic form factors of the liljγ vertex at one-loop level in the minimal G2HDM which has a sub-GeV vector dark matter candidate. The results are applied to the radiative decay rates for the charged lepton flavor violating processes li → ljγ, and the anomalous magnetic dipole moment and the electric dipole moment of the charged lepton. To numerically compute the branching ratio for μ → eγ and compare with the latest experimental limit from MEG, we adapt our previous parameter space scan that is consistent with the relic density and constraints from direct searches of dark matter, W and Z mass measurements, as well as the LHC Higgs signal strengths and invisible width. While the extra contributions are at least an order of magnitude smaller than required to explain the ~4.2σ discrepancy in the muon anomaly, the existing MEG limit imposes stringent constraint on the parameter space. The remaining viable parameter space can be further probed by the MEG II sensitivity for μ → eγ as well as from the direct searches of sub-GeV dark matter in foreseeable future. Higher loop contributions may be significant to resolve the discrepancy in the muon anomaly and generate a non-vanishing electric dipole moments for the standard model quarks and leptons in G2HDM.

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Enhanced long-lived dark photon signals at the LHC

Liu

Tran

2020

J. High Energ. Phys.

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We construct a model in which the standard model is extended by a hidden sector with two gauge U(1) bosons. A Dirac fermion ψ charged under both U(1) fields is introduced in the hidden sector which can be a subcomponent of the dark matter in the Universe. Stueckelberg mass terms between the two new gauge U(1) fields and the hypercharge gauge boson mediate the interactions between the standard model sector and the hidden sector. A remarkable collider signature of this model is the enhanced long-lived dark photon events at the LHC than the conventional dark photon models; the long-lived dark photons in the model can be discriminated from the background by measuring the time delay signal in the precision timing detectors which are proposed to be installed in the LHC upgrades and have an O(10) pico-second detection efficiency. Searches with current LHCb data are also investigated. Various experimental constraints on the model including collider constraints and cosmological constraints are also discussed.

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Consistency of gauged two Higgs doublet model: gauge sector

Cited by 14 publications

References 66 publications

Complex scalar dark matter in the gauged two-Higgs-doublet model

Complex scalar dark matter in the gauged two-Higgs-doublet model

Charged lepton flavor violating radiative decays li → ljγ in G2HDM

Enhanced long-lived dark photon signals at the LHC

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