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 gaZZ, gaZγ, and gaWW 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 Mₐ = 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.