Probing a novel neutral heavy gauge boson within the mono-Z$^{\prime}$ portal at the HL-LHC

Abstract: This study examines the production of dark matter events alongside a Z$^{\prime}$ boson decaying through leptonic channels in simulated proton-proton collisions at the Large Hadron Collider. The analysis focuses on collisions at $\sqrt{s}$ = 14 TeV under high-luminosity conditions, corresponding to an integrated luminosity of 1000 fb$^{-1}$. Using Monte Carlo simulations interpreted within the Effective Field Theory (EFT) framework, the work investigates potential signatures of new physics. In the absence of such phenomena, upper limits are placed on critical EFT parameters, including the theory's cutoff scale and the mass of the Z$^{\prime}$ boson.