Implications of 
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-violating top-Higgs couplings at the LHC and Higgs factories

Kobakhidze, Archil; Liu, Ning; Wu, Lei; Yue, Jason

doi:10.1103/physrevd.95.015016

Cited by 40 publications

(51 citation statements)

References 73 publications

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“…In this work we perform a comprehensive study of the phenomenology of the EWSUSY scenario for the muon g − 2 and dark matter. Note that in the literature [29][30][31][32][33][34][35][36] such a scenario has been discussed to some extent. However, those studies either did not require the SUSY dark matter to provide the correct abundance or focused on the phenomenology at the LHC.…”

Section: Introductionmentioning

confidence: 99%

Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Abdughani

Hikasa

et al. 2019

J. High Energ. Phys.

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Given that the LHC experiment has produced strong constraints on the colored supersymmetric particles (sparticles), testing the electroweak supersymmetry (EWSUSY) will be the next crucial task at the LHC. On the other hand, the light electroweakinos and sleptons in the EWSUSY can also contribute to the dark matter (DM) and low energy lepton observables. The precision measurements of them will provide the indirect evidence of SUSY. In this work, we confront the EWSUSY with the muon g − 2 anomaly, the DM relic density, the direct detection limits and the latest LHC Run-2 data. We find that the sneutrino DM or the neutralino DM with sizable higgsino component has been excluded by the direct detections. Then two viable scenarios are pinned down: one has the light compressed bino and sleptons but heavy higgsinos, and the other has the light compressed bino, winos and sleptons. In the former case, the LSP and slepton masses have to be smaller than about 350 GeV. While in the latter case, the LSP and slepton masses have to be smaller than about 700 GeV and 800 GeV, respectively. From investigating the observability of these sparticles in both scenarios at future colliders, it turns out that the HE-LHC with a luminosity of 15 ab −1 can exclude the whole BHL and most part of BWL scenarios at 2σ level. The precision measurement of the Higgs couplings at the lepton colliders could play a complementary role of probing the BWL scenario.

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Section: Introductionmentioning

confidence: 99%

Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Abdughani

Hikasa

et al. 2019

J. High Energ. Phys.

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“…The presence of sin ξ term leads to the CP violation in top-Higgs coupling. It will affect the Higgs production and decay channels, the electric dipole moments and the flavor physics observables, which are measured to well agree with the SM and then set strong constraints on the CP-violating top-Higgs coupling [6,7]. However, these indirect bounds are model-dependent and * renjie@itp.ac.cn † leiwu@itp.ac.cn ‡ jmyang@itp.ac.cn can be evaded in some extensions of the SM.…”

Section: Introductionmentioning

confidence: 99%

Unveiling CP property of top-Higgs coupling with graph neural networks at the LHC

Ren

Yang

2020

Physics Letters B

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The top-Higgs coupling plays an important role in particle physics and cosmology. The precision measurements of this coupling can provide an insight to new physics beyond the Standard Model. In this paper, we propose to use Message Passing Neural Network (MPNN) to reveal the CP nature of top-Higgs interaction through semi-leptonic channel pp → t(→ b − ν )t(→bjj)h(→ bb). Using the test statistics constructed from the event classification probabilities given by the MPNN, we find that the pure CP-even and CP-odd components can be well distinguished at the LHC, with at most 300 fb −1 experimental data.

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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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Implications of CP -violating top-Higgs couplings at the LHC and Higgs factories

Cited by 40 publications

References 73 publications

Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Unveiling CP property of top-Higgs coupling with graph neural networks at the LHC

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

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