Model-independent limits for anomalous triple gauge bosons $W^+W^-\gamma$ coupling at the CLIC

TL;DR

This paper assesses the potential of the future CLIC collider to set stringent, model-independent limits on anomalous $W^+W^- ext{-}\gamma$ couplings through various photon-induced processes, outperforming current collider bounds.

Contribution

It provides the first detailed analysis of CLIC's sensitivity to anomalous $W^+W^- ext{-}\gamma$ couplings using multiple collision modes and decay channels, with projected limits surpassing existing data.

Findings

Projected limits on $\Delta ext{kappa}_ ext{ extgamma}$ and $ ext extlambda_ ext{ extgamma}$ reach $10^{-5}$ to $10^{-4}$.

CLIC's photon-induced processes offer a promising avenue for probing anomalous gauge couplings.

Results indicate significant improvement over LHC, Tevatron, and LEP constraints.

Abstract

We investigate the potential of the Compact Linear Collider (CLIC) to probe the anomalous $W^+W^-\gamma$ coupling in $\gamma\gamma$, $\gamma\gamma^*$ and $\gamma^*\gamma^*$ collisions through the processes $\gamma\gamma\rightarrow W^+ W^-$, $e^+ \gamma \rightarrow e^+ \gamma^{*} \gamma \rightarrow e^+ W^- W^+$ and $e^+ e^-\rightarrow e^+ \gamma^{*} \gamma^{*} e^- \rightarrow e^+ W^- W^+ e^-$. We perform leptonic, semi-leptonic and hadronic decays channels for $W^+W^-$ production in the final state. Taking ${\cal L}=1\hspace{0.8mm}{\rm ab^{-1}}@ \sqrt{s}=0.380\hspace{0.8mm}{\rm TeV}$, ${\cal L}=2.5\hspace{0.8mm}{\rm ab^{-1}}@ \sqrt{s}=1.5\hspace{0.8mm}{\rm TeV}$ and ${\cal L}=5\hspace{0.8mm}{\rm ab^{-1}}@ \sqrt{s}=3\hspace{0.8mm}{\rm TeV}$, based on future CLIC data, the limits for $\Delta\kappa_\gamma$ and $\lambda_\gamma$ might reach up to ${\cal O}(10^{-5}-10^{-4})$ level in the most ideal with 5\hspace{0.8mm}${\rm ab^{-1}}$ set data, which shows a potential advantage compared to those from LHC, Tevatron and LEP data. Thus, our results represent that the processes $\gamma\gamma\rightarrow W^+ W^-$, $e^+ \gamma \rightarrow e^+ \gamma^{*} \gamma \rightarrow e^+ W^- W^+$ and $e^+ e^-\rightarrow e^+ \gamma^{*} \gamma^{*} e^- \rightarrow e^+ W^- W^+ e^-$ at the CLIC are a very good prospect for probing the anomalous $W^+W^-\gamma$ couplings.