Probe CP violation in $H\to \gamma Z$ through forward-backward asymmetry

Abstract

We suggest that the forward-backward asymmetry $(A_{FB})$ of the charged leptons in $gg\to H\to \gamma Z\to \gamma {\ell }^{-}{\ell }^{+}$ process could be used to probe the CP violating $H\gamma Z$ coupling when the interference from $gg\to \gamma Z\to \gamma {\ell }^{-}{\ell }^{+}$ process is included. With CP violation in $H\gamma Z$ coupling, the interference effect leads to a non-vanishing $A_{FB}$, which is also sensitive to the strong phase differences. The resonant and non-resonant strong phases together make $A_{FB}(\hat{s})$ change sign around Higgs mass $M_H$. For phenomenology study, we suggest the integral over one-side mass region below $M_H$ to magnify the $A_{FB}$ strength.

18 pages, 7 figures

References in corpus (6)

• Vector boson pair production at the LHC
• New Observables for CP Violation in Higgs Decays
• Probing the Higgs Couplings to Photons in $h\to 4\ell$ at the LHC
• Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair
• Probing CP-violating $h\bar{t}t$ coupling in $e^{+}{e}^{-}\to h\gamma$
• Probing CP Violation in $h\to Z\gamma$ with Background Interference

Cited by in corpus (5)

• Higgs boson to $\gamma Z$ decay as a probe of flavour changing neutral Yukawa couplings
• $H\to Z\gamma$ decay and $CP$ violation
• Exploring $HVV$ amplitudes with $CP$ violation by decomposition and on-shell scattering amplitude methods
• Probe $CP$-violating $H\gamma \gamma$ coupling through interferometry
• Anomalous $H\to ZZ\to 4\ell$ decay and its interference effects at the LHC