Constraining Axion-Gluon Coupling in Mono-hadron Processes

• DOI: 10.48550/arxiv.2405.18215
• Publication Date: 2024-05-28
• Authors: Shou-Shan Bao; Wenhai Gao; Hong Zhang; Jian Zhou
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); FOS: Physical sciences

The axion-gluon coupling can be constrained directly through hard exclusive processes at the LHC. Specifically, we study associated production of a long-lived axion with $\rho^0$ meson in ultra-peripheral $AA$ collisions and $pp$ collisions. With escaped from detector, final state is characterized by mono-hadron signature. main background our analysis originates $\rho^0+\pi^0$ process, where photons $\pi^0$ decay are undetected due to limited detector performance. Our yields an exclusion limit that comparable obtained mono-jet process