Analysis of the anomalous quartic W W W W couplings at the LHeC and the FCC-he
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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 → νe W + W − j at the Large Hadron
Electron Collider and the Future Circular Collider-hadron electron to study non-standard
W W W W 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%
f M0 f M1 f M7 f S0 f S1 f T 0 f T 1
fT 2
Confidence Level on the anomalous 4 , 4 , 4 , , , , and couplings
4 4 4 4 4obtained by dimension-8 operators through the process ep → νe W +
W −
j for the Large
Hadron Electron Collider and the Future Circular Hadron Electron Collider’s different center-
of-mass energies and integrated luminosities. Our results show that with the process ep →
νe W + W − j at the Large Hadron Electron Collider and the Future Circular Collider-hadron
electron the sensitivity estimated on the anomalous W W W W couplings can be importantly
strengthened.