Search for the anomalous $ZZ\gamma$ and $Z\gamma\gamma$ couplings via $\nu \nu \gamma$ production at the CLIC

TL;DR

This study investigates the potential to detect anomalous neutral triple gauge couplings involving Z and gamma bosons at the CLIC collider, providing more stringent sensitivity limits than previous experiments through detailed analysis of $e^+e^- o Z o uar{ u}\gamma$ processes.

Contribution

It offers the first comprehensive sensitivity analysis of anomalous $ZZ ext{-}\gamma$ and $Z ext{-}\gamma ext{-}\gamma$ couplings at the CLIC with polarized beams, improving existing limits significantly.

Findings

Sensitivity limits are 10-30 times more stringent than previous experimental bounds.

Polarized electron beams enhance the detection sensitivity.

Systematic uncertainties affect the precision of the coupling measurements.

Abstract

The non-Abelian gauge structure of the Standard Model implies the presence of the multi-boson self-interactions. Precise measurements in experimental and theoretical studies of these interactions allow not only testing the nature of the Standard Model but also new physics contribution coming from the beyond Standard Model. These interactions can be examined using a model-independent way in effective theory approach that composes the motivation part of this study. In this paper, we examine the anomalous $ZZ\gamma$ and $Z\gamma\gamma$ neutral triple gauge couplings via the process $e^{-} e^{+}\to Z\gamma$ for the neutrino-antineutrino pair decay of $Z$ boson. It has performed with both unpolarized and polarized electron beams at the Compact Linear Collider with $\sqrt{s}= 3$ TeV. The study focused on $CP$-conserving $C_{\widetilde{B}W}/{\Lambda^4}$ and $CP$-violating $C_{BB}/{\Lambda^4}$, $C_{BW}/{\Lambda^4}$, $C_{WW}/{\Lambda^4}$ couplings. Obtained sensitivities on the anomalous neutral triple gauge couplings with $95\%$ Confidence Level are given with systematic uncertainties of $0\%$, $5\%$ and $10\%$ for unpolarized, $-80\%$ and $80\%$ polarized electron beams with integrated luminosities of ${\cal L}_{\text{int}}=5$ $\rm ab^{-1}$, ${\cal L}_{\text{int}}=4$ $\rm ab^{-1}$ and ${\cal L}_{\text{int}}=1$ $\rm ab^{-1}$, respectively. Comparing the latest experimental limits and related phenomenological studies, our results on the anomalous neutral gauge couplings are set more stringent sensitivity between 10-30 times of magnitude.