Analysis of the anomalous quartic WWWW couplings at the LHeC and the FCC-he

Abstract

The quartic gauge boson couplings that identify the strengths of the gauge boson self-interactions are exactly determined by the non-Abelian gauge nature of the Standard Model. The examination of these couplings at ep collisions with high center-of-mass energy and high integrated luminosity provides an important opportunity to test the validity of the Standard Model and the existence of new physics beyond the Standard Model. The quartic gauge boson couplings can contribute directly to multi-boson production at colliders. Therefore, we examine the potential of the process ep → νeW+W− j at the Large Hadron Electron Collider and the Future Circular Collider-hadron electron to study non-standard WWWW couplings in a model independent way by means of the effective Lagrangian approach. We present an investigation on measuring W+W− production in pure leptonic and semileptonic decay channels. In addition, we calculate the sensitivity limits at 95% Confidence Level on the anomalous fM0 4 , fM1 4 , fM7 4 , fS0 4 , fS1 4 , fT 0 4 , fT 1 4 and fT 2 4 couplings obtained by dimension-8 operators through the process ep → νeW+W− j for the Large Hadron ElectronCollider and the Future Circular Hadron ElectronCollider’s different centerof- mass energies and integrated luminosities. Our results show that with the process ep → νeW+W− j at the Large Hadron Electron Collider and the Future Circular Collider-hadron electron the sensitivity estimated on the anomalous WWWW couplings can be importantly strengthened.