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

Abstract

In this work, we calculate the sensitivities on the gauge-boson couplings $g_{aZZ}$, $g_{aZ\gamma }$, and $g_{aWW}$ of an axion-like particle (ALP) that one can achieve at the LHC with $\sqrt{s}=14$ TeV and integrated luminosities of 300 fb${}^{-1}$ (current run) and 3000 fb${}^{-1}$ (High-Luminosity LHC). We focus on the associated production processes $pp\to Za\to (l^{+}{l}^{-})(\gamma \gamma )$ and $pp\to W^{\pm }a\to (l^{\pm }\nu )(\gamma \gamma )$. 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 $10^{-4}{\mathrm{GeV}}^{-1}$. 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.

22 Pages, 8 Figures and 7 Tables, JHEP Accepted Version