Constraints on anomalous quartic gauge couplings by $\gamma\gamma \to W^+W^-$ scattering

TL;DR

This paper investigates how the Large Hadron Collider can constrain anomalous quartic gauge couplings through exclusive gamma-gamma to W+W- scattering, analyzing signal features and setting bounds on new physics operators.

Contribution

It introduces a method to analyze dimension-8 operators affecting gamma-gamma to W+W- scattering and derives constraints on these anomalous couplings at 13 TeV LHC.

Findings

Constraints on anomalous quartic gauge couplings established.

Event selection strategy enhances sensitivity to aQGC signals.

Statistical analysis demonstrates the potential to probe new physics.

Abstract

The vector boson scattering (VBS) processes in Large Hadron Collider (LHC) experiments offer a unique opportunity to probe the anomalous quartic gauge couplings (aQGCs). We study the dimension-8 operators contributing to the anomalous $\gamma\gamma WW$ coupling and the corresponding unitarity bounds via the exclusive $\gamma\gamma \to W^+W^-$ production in $pp$ collisions at LHC for a center of mass energy of $\sqrt{s}=13$ TeV. By analysing the kinematical features of the signal, we propose an event selection strategy to highlight the aQGC contributions. Based on the event selection strategy, the statistical significance of the signals are analyzed in detail, and the constraints on the coefficients of the anomalous quartic gauge operators are obtained.