Several theories that lie beyond the Standard Model include the existence of High Electric Charge Objects (HECOs). Due to the large coupling, the perturbation theory breaks down. Nevertheless, one can resum the QED corrections at a UV fixed point for high electric charge and mass values.
In this study, a HECO is assumed to be a spin-1/2 Dirac fermion which couples to photons and $Z^0$ bosons. At colliders, HECOs can be pair-produced via Drell-Yan and Photon-Fusion processes. The Universal FeynRules Output (UFO) implementation - including resummation effects - was performed for both production mechanisms, thus being available for Monte Carlo generators such as MadGraph5. The UFO models were successfully validated by comparing cross-section values obtained by analytical calculations through Wolfram Mathematica and those computed by MadGraph5. In this work, we perform
a Dyson–Schwinger resummation scheme, which makes the computation of the pertinent HECO-production cross sections reliable, thus allowing us
to extract improved mass bounds for such objects from ATLAS and MoEDAL searches.