Probing the Gauge-boson Couplings of Axion-like Particle at the LHC and High-Luminosity LHC

In this work, we calculate the sensitivities on the gauge-boson couplings g_aZZ, g_aZγ, and g_aWW of an axion-like particle (ALP) that one can achieve at the LHC with √(s)=14 TeV and integrated luminosities of 300 fb^-1 (current run) and 3000 fb^-1 (High-Luminosity LHC). We focus on the associated production processes pp→ Za → (l^+l^-)(γγ) and pp→ W^± a → (l^±ν)(γγ). We show that better sensitivities on these gauge couplings can be achieved at the LHC for M_a = 1-100 GeV, down to the level of 10^-4 GeV^-1. In conclusion, this study emphasizes the significance of the investigated channels in constraining the ALP couplings at the LHC, offering valuable insights for future experiments dedicated to ALP detection.