Probing $HZ\gamma$ and $H\gamma \gamma$ Anomalous Couplings in the Process of $e^{+}{e}^{-}\to H\gamma$

Abstract

We propose to measure the $HZ\gamma$ and $H\gamma \gamma$ anomalous couplings in the process of $e^{+}{e}^{-}\to H\gamma$ with the sequential decay of $H\to b\bar{b}$. The discovery potential of observing the anomalous couplings are explored in details. Our study shows that the electron-positron collider has a great potential of testing the $HZ\gamma$ and $H\gamma \gamma$ couplings. Conservative bounds on the two anomalous couplings are also derived when no new physics signal were detected on top of the SM backgrounds.

10 pages, 8 figures, submitted to Chinese Physics C

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• Beyond Higgs Couplings: Probing the Higgs with Angular Observables at Future $e^{+}{e}^{-}$ Colliders
• CEPC Precision of Electroweak Oblique Parameters and Weakly Interacting Dark Matter: the Fermionic Case
• Implications of CP-violating Top-Higgs Couplings at LHC and Higgs Factories
• Exploring Fermionic Dark Matter via Higgs Boson Precision Measurements at the Circular Electron Positron Collider
• CEPC Precision of Electroweak Oblique Parameters and Weakly Interacting Dark Matter: the Scalar Case
• Higgs boson decay $h\to Z\gamma$ and muon magnetic dipole moment in the $\mu \nu$SSM
• Single Higgs production in association with a photon at electron-positron colliders in extended Higgs models
• Next-to-leading-order QCD corrections to $e^{+}{e}^{-}\to H+\gamma$
• Probing CP-violating $h\bar{t}t$ coupling in $e^{+}{e}^{-}\to h\gamma$
• An indirect probe of higgsino world at the CEPC
• Higgs boson to $\gamma Z$ decay as a probe of flavour changing neutral Yukawa couplings
• Non-standard Higgs couplings in single Higgs boson production at the LHC and future linear collider
• Associated production of Higgs boson with a photon at electron-positron colliders
• Probing the $H\gamma \gamma$ coupling via Higgs exclusive decay into quarkonia plus a photon at the HL-LHC
• Discovering the $h\to Z\gamma$ Decay in $t\bar{t}$ Associated Production
• Detecting quark anomalous electroweak couplings at the LHC