Author(s): G. Aad et al. (ATLAS Collaboration) This Letter presents a measurement of prompt charged-particle production in proton-oxygen interactions at $\sqrt{{s}_{\mathrm{NN}}}=9.62\text{ }\text{ }\mathrm{TeV}$ center-of-mass energy with the ATLAS detector, corresponding to $634\text{ }\text{ }μ{\mathrm{b}}^{−1}$ of integrated luminosity. A to… [Phys. Rev. Lett. 137, 121901] Published Mon Sep 14, 2026