Probe of the anomalous neutral triple gauge couplings in photon-induced collision at future muon colliders

TL;DR

This paper investigates the potential to detect anomalous neutral triple gauge couplings at future muon colliders through photon-induced processes, providing sensitivity estimates and limits on new physics couplings at various energies and luminosities.

Contribution

It introduces a new analysis method for probing neutral triple gauge couplings at muon colliders using photon-induced processes and estimates sensitivity limits at different collider configurations.

Findings

Best limits on couplings at 14 TeV with 20 ab$^{-1}$ luminosity.

Sensitivity improves with higher energy and luminosity.

Systematic uncertainties affect the coupling sensitivity bounds.

Abstract

The anomalous $ZZ\gamma$ and $Z\gamma\gamma$ neutral triple gauge couplings occurred by dimension-eight operators are investigated through the process $\mu^+\mu^-\,\rightarrow\,\mu^+\gamma^*\mu^-\,\rightarrow\,\mu^+ Z(\nu\bar{\nu})\mu^-$ at the muon collider with $\sqrt{s}=3$, $6$, $10$ and $14$ TeV. The charged lepton pseudo-rapidity, the charged lepton transverse momentum and the transverse missing energy distributions are taken in consideration for the final state of the process in the analysis. The sensitivities of the anomalous couplings are obtained at $95\%$ Confidence Level with integrated luminosity of ${\cal L}_{\text{int}}=1$, $4$, $10$ and $20$ ab$^{-1}$, respectively, according to center-of-mass energies of muon collider taking into account the effects of systematic uncertainties $0\%$, $3\%$ and $5\%$. The best limits of anomalous $C_{BB}/{\Lambda^4}$, $C_{BW}/{\Lambda^4}$, $C_{\widetilde{B}W}/{\Lambda^4}$ and $C_{WW}/{\Lambda^4}$ couplings without systematic uncertainty at center-of-mass energy of 14 TeV and integrated luminosity of 20 ab$^{-1}$ are found to be [-0.01026; 0.00636] TeV$^{-4}$, [-0.02482; 0.03053] TeV$^{-4}$, [-0.01830; 0.02510] TeV$^{-4}$, [-0.06981; 0.07387] TeV$^{-4}$, respectively.