Sensitivity reach on anomalous Higgs couplings via triphoton production for the post-LHC circular high-energy hadron colliders

Abstract

The potential of triphoton production to obtain limits on anomalous Higgs boson couplings at $H\gamma \gamma$ and $HZ\gamma$ vertices is studied in Standard Model Effective Field Theory (EFT) framework for the post-LHC circular high-energy hadron colliders: High Luminosity-LHC (HL-LHC), High Energy LHC (HE-LHC) and Low Energy FCC (LE-FCC) which are designed with standard configurations of 14 TeV/3 ab${}^{-1}$, 27 TeV/15 ab${}^{-1}$ and 37.5 TeV/15 ab${}^{-1}$. Madgraph in which the effective Lagrangian of the SM EFT is implemented using FeynRules and UFO framework is used to generate both background and signal events. These events are then passed through Pythia 8 for parton showering and Delphes to include realistic detector effects. After optimizing cuts on kinematics of three photons as well as the reconstructed invariant mass of the two leading photons, invariant mass of three leading photon is used to obtain constraints on the Wilson coefficients of dimension-six operators. We report the result of two dimensional scan of ${\bar{c}}_{\gamma }$ and ${\tilde{c}}_{\gamma }$ couplings at 95\% confidence level and compare with LHC results. Our obtained limits without systematic error on ${\bar{c}}_{\gamma }$ ( ${\tilde{c}}_{\gamma }$) are $[-3.15;1.41]\times 10^{-2}$ ($[-2.12;2.12]\times 10^{-2}$), $[-1.21;0.78]\times 10^{-2}$ ($[-0.98;0.98]\times 10^{-2}$) and $[-0.89;0.66]\times 10^{-2}$ ($[-0.77;0.77]\times 10^{-2}$) for HL-LHC, HE-LHC and LE-FCC, respectively.

16 pages, 10 figures, version accepted in Acta Physica Polonica B. arXiv admin note: text overlap with arXiv:1901.04784

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Cited by in corpus (5)

• Triphoton production at hadron colliders in NNLO QCD
• Two-Loop QCD Corrections for Three-Photon Production at Hadron Colliders
• Study on the sensitivity of the Higgs boson couplings in photon-photon collision at CLIC and muon collider
• Probing CP-violating Higgs-gauge Boson Couplings at Future Muon Collider
• Analysis of anomalous $H\gamma \gamma$ coupling in light-by-light collision at future muon collider