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Li, Gang; Wang, Haoran; Zhu, Shou-hua

doi:10.1103/physrevd.93.055038

Cited by 12 publications

(10 citation statements)

References 69 publications

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“…[94][95][96]. There are also some works on this process in many new physics models, for example, the MSSM [96][97][98][99], extended scalar sector models [100,101], VLQ models [102], effective field theory framework [103][104][105][106], and simplified scenarios [107]. Besides, we can also probe the FCNY couplings through direct production processes pp → Tth; Tt; ThW; Thj.…”

Section: Numerical Results and Constraint Prospectsmentioning

confidence: 99%

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

2020

Phys. Rev. D

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With the deeper study of Higgs particle, Higgs precision measurements can be served to probe new physics indirectly. In many new physics models, vectorlike quarks T L , T R occur naturally. It is important to probe their couplings with standard model particles. In this work, we consider the singlet T L , T R extended models and show how to constrain the Tth couplings through the h → γZ decay at high-luminosity LHC. First, we derive the perturbative unitarity bounds on jy tT L;R j with other couplings set to be zeros simply. To optimize the situation, we take m T ¼ 400 GeV and s L ¼ 0.2 considering the experimental constraints. Under this benchmark point, we find that the future bounds from h → γZ decay can limit the real parts of y tT L;R in the positive direction to be O(1) because of the double enhancement. For the real parts of y tT L;R in the negative direction, it is always surpassed by the perturbative unitarity. Moreover, we find that the top quark electric dipole moment can give stronger bounds (especially the imaginary parts of y tT L;R) than the perturbative unitarity and h → γZ decay in the off-axis regions for some scenarios.

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Section: Numerical Results and Constraint Prospectsmentioning

confidence: 99%

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

2020

Phys. Rev. D

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“…The previous studies of the collider measurements of the CPV in the Higgs Yukawa couplings can be found in refs. [43,[55][56][57][58][59][60][61][62]. Table 1.…”

Section: The Couplings In the Cpv 2hdmmentioning

confidence: 99%

Higgs pair productions in the CP-violating two-Higgs-doublet model

Bian

Chen

2016

J. High Energ. Phys.

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In this work, we study the SM-like Higgs pair productions in the framework of the general CP-violating two-Higgs-doublet model. Several constraints are imposed to the model sequentially, including the SM-like Higgs boson signal fits, the precise measurements of the electric dipole moments, the perturbative unitarity and stability bounds to the Higgs potential, and the most recent LHC searches for the heavy Higgs bosons. We show how the CP-violating mixing angles are related to the Higgs cubic self couplings in this setup. Based on these constraints, we suggest benchmark models for the future high-energy collider searches for the Higgs pair productions. The e + e − colliders operating at √ s = (500 GeV , 1 TeV) are capable of measuring the Higgs cubic self couplings of the benchmark models directly. Afterwards, we estimate the cross sections of the resonance contributions to the Higgs pair productions for the benchmark models at the future LHC and SppC/Fcc-hh runs. Other possible decay modes for the heavy Higgs bosons are also discussed.

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“…On the other hand, new physics effects on the process have not been fully explored yet. There are several studies in the literature in the context of anomalous Higgsboson couplings or an effective field theory [10][11][12][13][14][15] as well as concrete new physics models such as supersymmetric models [7,[16][17][18] and the inert doublet model (IDM) [19].…”

Section: Introductionmentioning

confidence: 99%

Single Higgs production in association with a photon at electron-positron colliders in extended Higgs models

2019

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We study associated Higgs production with a photon at electron-positron colliders, e + e − → hγ, in various extended Higgs models, such as the inert doublet model (IDM), the inert triplet model (ITM) and the two Higgs doublet model (THDM). The cross section in the standard model (SM) is maximal around √ s = 250 GeV, and we present how and how much the new physics can enhance or reduce the production rate. We also discuss the correlation with the h → γγ and h → Zγ decay rates. We find that, with a sizable coupling to a SMlike Higgs boson, charged scalars can give considerable contributions to both the production and the decay if their masses are around 100 GeV. Under the theoretical constraints from vacuum stability and perturbative unitarity as well as the current constraints from the Higgs measurements at the LHC, the production rate can be enhanced from the SM prediction at most by a factor of two in the IDM. In the ITM, in addition, we find a particular parameter region where the hγ production significantly increases by a factor of about six to eight, but the h → γγ decay still remains as in the SM. In the THDM, possible deviations from the SM prediction are minor in the viable parameter space.

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ProbingCP-violatinght¯tcoupling ine+e<

Cited by 12 publications

References 69 publications

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

Higgs pair productions in the CP-violating two-Higgs-doublet model

Single Higgs production in association with a photon at electron-positron colliders in extended Higgs models

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