Enhancing $t\bar{t}hh$ production through CP-violating top-Higgs interaction at the LHC, ILC and a 100 TeV collider

Abstract

The measurement of Higgs self-coupling is one of the most crucial physics goals at the future colliders. At the LHC, the di-Higgs production is a main way to measure the Higgs trilinear coupling. As a complementary to the di-Higgs production, $t\bar{t}hh$ process may open a new avenue to measure di-Higgs physics at the LHC and a future 100 TeV $pp$ collider or a high energy $e^{+}{e}^{-}$ collider since the extra $t\bar{t}$ in the final states may efficiently suppress the backgrounds. However, such a kind of process is also controlled by the top-Higgs coupling. In this work, we investigate the impact of CP-violating top-Higgs coupling on $t\bar{t}hh$ production at the LHC, ILC and a 100 TeV hadron collider under the current Higgs data. Within 2$\sigma$ Higgs data allowed parameter region, we find that the cross section of $t\bar{t}hh$ at the LHC-14 TeV, ILC-1 TeV and VHE-LHC/SPPC-100 TeV can be enhanced up to 2.1 times the SM predictions. The future precise measurement of Higgs coupling will reveal the nature of top-Higgs interaction and improve the sensitivity of the determination of Higgs self-coupling through $t\bar{t}hh$ production.

arXiv commentDiscussions and figures added, Version accepted by JHEP

References in corpus (57)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• New parton distributions for collider physics
• HiggsBounds: Confronting Arbitrary Higgs Sectors with Exclusion Bounds from LEP and the Tevatron
• HiggsSignals: Confronting arbitrary Higgs sectors with measurements at the Tevatron and the LHC
• Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD
• Higgs pair production at the LHC with NLO and parton-shower effects
• Scalar and pseudoscalar Higgs production in association with a top-antitop pair
• Higgs boson pair production in the D=6 extension of the SM
• Search for the associated production of the Higgs boson with a top-quark pair
• Virtual corrections to Higgs boson pair production in the large top quark mass limit
• Anomalous Couplings in Double Higgs Production
• Higgs boson pair production at the LHC in the $b\bar{b}{W}^{+}{W}^{-}$ channel
• Disentangling Higgs-Top Couplings in Associated Production
• Di-Higgs final states augMT2ed -- selecting $hh$ events at the high luminosity LHC
• Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson
• Lab-frame observables for probing the top-Higgs interaction
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Further on up the road: $hhjj$ production at the LHC
• Probing top-Higgs non-standard interactions at the LHC
• Single top and Higgs associated production as a probe of the Htt coupling sign at the LHC
• Precision Higgsstrahlung as a Probe of New Physics
• NNLO QCD corrections to Higgs pair production via vector boson fusion at hadron colliders
• A Double Take on New Physics in Double Higgs Production
• Scrutinizing h(125) in Two Higgs Doublet Models at the LHC, ILC, and Muon Collider
• $ttH$ Anomalous Coupling in Double Higgs Production
• Higgs Boson pair production merged to one jet
• New physics effects on top quark spin correlation and polarization at the LHC: a comparative study in different models
• Probing the Top-Yukawa Coupling in Associated Higgs production with a Single Top Quark
• Pair production of a 125 GeV Higgs boson in MSSM and NMSSM at the ILC
• Non-resonant Higgs pair production in the $b\bar{b}b\bar{b}$ final state at the LHC
• Constraining Top partner and Naturalness at the LHC and TLEP
• Enhanced $thj$ signal at the LHC with $h\to \gamma \gamma$ decay and $\mathcal{C}\mathcal{P}$-violating top-Higgs coupling
• Measuring the tth coupling from SSDL+2b measurements
• Effect of Anomalous Couplings on the Associated Production of a Single Top Quark and a Higgs Boson at the LHC
• New physics in resonant production of Higgs boson pairs
• Modified Higgs couplings and unitarity violation
• Testing new physics models by top charge asymmetry and polarization at the LHC
• Probe Higgs boson pair production via the $3\ell 2j$ + missing $E_T$ mode
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Bounding the top Yukawa with Higgs-associated single-top production
• Enhancing the ttH signal through top-quark spin polarization effects at the LHC
• Impact of top-Higgs couplings on di-Higgs production at future colliders
• Remarks on double Higgs boson production by gluon fusion at threshold
• Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC
• The Triple Higgs Boson Self-Coupling at Future Linear e+e- Colliders Energies: ILC and CLIC
• Study of the heavy CP-even Higgs with mass 125 GeV in two-Higgs-doublet models at the LHC and ILC
• Full one-loop electroweak corrections to $e^{+}{e}^{-}\to ZH\gamma$ at a Higgs factory
• Standard Model with a distorted Higgs sector and the enhanced Higgs diphoton decay rate
• Higgs-strahlung production process e^+ e^- \to Z h at the future Higgs factory in the Minimal Dilaton Model
• Higgs self-coupling in the MSSM and NMSSM after the LHC Run 1
• Measuring Di-Higgs Physics via the $t\bar{t}hh\to t\bar{t}b\bar{b}b\bar{b}$ Channel
• Study of ttH (H -> mu mu) in the three lepton channel at sqrt(s) = 14 TeV; A Snowmass white paper
• SUSY effects in Higgs productions at high energy $e^{+}{e}^{-}$ colliders
• Revisiting Associated Production of 125 GeV Higgs Boson with a Photon at a Higgs Factory
• Double Higgs production in the littlest Higgs Model with T-parity at high energy $e^{+}{e}^{-}$ Colliders

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