Constraints on the anomalous Higgs boson couplings in $Z\gamma\gamma$ production at muon collider

TL;DR

This paper explores how future muon colliders can constrain anomalous Higgs couplings through the process  Z, using effective field theory and detailed simulations to improve understanding of Higgs interactions.

Contribution

It provides new sensitivity estimates for dimension-six operators affecting Higgs couplings at a 10 TeV muon collider, incorporating realistic detector effects and systematic uncertainties.

Findings

Limits on c_{HB} and c_{HW} are significantly improved over current bounds.

Systematic uncertainties of 15% impact the sensitivity reach.

Future muon colliders can effectively probe anomalous Higgs interactions.

Abstract

We investigate the sensitivities on the Wilson coefficients of dimension-six operators associated with the anomalous $H\gamma\gamma$, $H\gamma Z$ and $HZZ$ vertices through the process $\mu^- \mu^+ \rightarrow Z\gamma\gamma$ at future muon collider. Signal events involving Higgs-gauge boson interactions and relevant backgrounds events at the muon collider designed with a center-of-mass energy of 10 TeV and an integrated luminosity of 10 ab$^{-1}$ are generated in Madgraph within the framework of the model-independent Standard Model effective field theory. Realistic detector effects of the muon collider detector are simulated by Delphes. The limits at 95% C.L., $3\sigma$ and $5\sigma$ on the coefficients $\overline{c}_{HB}$ and $\overline{c}_{HW}$ are obtained without and with systematic uncertainty of 15% and compared with the present experimental and phenomenological limits.