Study on the anomalous quartic $W^+W^-\gamma\gamma$ couplings of electroweak bosons in $e^-p$ collisions at the LHeC and the FCC-he

TL;DR

This study investigates the potential of future electron-proton colliders, LHeC and FCC-he, to probe anomalous quartic $W^+W^-\gamma\gamma$ couplings with high sensitivity, offering a cleaner environment than the LHC.

Contribution

It introduces a novel analysis of $e^-p$ collision data to constrain quartic gauge couplings, demonstrating competitive sensitivity with existing collider limits.

Findings

Future colliders can set 95% C.L. limits on anomalous couplings.

The analysis shows improved sensitivity over current LHC bounds.

The $e^-p$ collision mode provides a cleaner environment for studying electroweak couplings.

Abstract

In this paper, a study is carried out on the $e^-p \to e^-\gamma^* p \to p W^+\gamma \nu_e$ production to probe quartic $W^+W^-\gamma\gamma$ couplings using 10, 100 ${\rm fb^{-1}}$ of $e^-p$ collisions data at $\sqrt{s}$= 1.30, 1.98 GeV at the Large Hadron electron Collider (LHeC) and 100, 1000 ${\rm fb^{-1}}$ with $\sqrt{s}$= 3.46, 5.29 GeV at the Future Circular Collider-hadron electron (FCC-he). Production cross-sections are determined for both at leptonic and hadronic decay channel of the $W$-boson. With the data from future $e^-p$ colliders, it is possible to obtain sensitivity measures at $95\%$ C.L. on the anomalous $f_ {M,i}/\Lambda^4$ and $ f_ {T,i}/\Lambda^4$ couplings which are competitive with the limits obtained by the LHC, as well as with others limits reported in the literature. The production mode $e^-p \to e^-\gamma^* p \to p W^+\gamma \nu_e $ in $e^-p$ collisions offers a window for study the quartic $W^+W^-\gamma\gamma$ electroweak bosons couplings at the LHeC and the FCC-he, which provides a much cleaner collision environment than the LHC.