Probing neutral triple gauge couplings at e⁻p colliders

The Standard Model Effective Field Theory (SMEFT) has attracted much attention as a model-independent way for probing new physical signals. In the SMEFT framework, e⁻p e - p colliders can be used to study new interactions of gauge bosons, such as neutral Triple Gauge Couplings (nTGCs). We study the signals and backgrounds of six different processes at the Future Circular Collider-hadron electron (FCC-he) and propose different event selection strategies. The expected constraints on the coefficients of the dimension-8 operators for each process, as well as the combined constraints are obtained. The results show that the sensitivity of e⁻p e - p colliders to nTGCs is similar to the current Large Hadron Collider (LHC) experiments and is more competitive than that of Circular Electron Positron Collider (CEPC) experiments.