Triple Gauge Couplings at Future Hadron and Lepton Colliders

TL;DR

This paper investigates the potential to measure anomalous triple gauge couplings at future electron-positron and proton-proton colliders, providing projected sensitivity limits and comparing them to existing constraints.

Contribution

It presents a detailed analysis of the sensitivity to triple gauge couplings at CEPC and LHC, including new projected limits and their complementarity to other electroweak measurements.

Findings

CEPC can probe couplings down to 10^{-4}

LHC constraints are up to 10^{-3}

Limits are complementary to electroweak and Higgs measurements

Abstract

The $WW$ production is the primary channel to directly probe the triple gauge couplings. We analyze the $e^+ e^- \rightarrow W^+ W^-$ process at the proposed Circular Electron-Positron Collider (CEPC), and find that the anomalous triple gauge couplings and relevant dimension six operators can be probed up to the order of $10^{-4}$. We also estimate constraints at the 14 TeV LHC, with both 300 fb$^{-1}$ and 3000 fb$^{-1}$ integrated luminosity from the leading lepton $p_T$ and azimuthal angle difference $\Delta \phi_{ll}$ in the di-lepton channel. The constrain is somewhat weaker, up to the order of $10^{-3}$. The limits on the triple gauge couplings are complementary to those on the electroweak precision observables and Higgs couplings.