TY - GEN AU - Abdul Halim, A. AU - Pierre Auger Collaboration, / AU - Bueno Villar, Antonio PY - 2025 UR - https://hdl.handle.net/10481/104950 AB - We present measurements of the atmospheric depth of the shower maximum 𝑋�max, inferred for the first time on an event-by-event level using the surface detector of the Pierre Auger Observatory. Using deep learning, we were able to extend measurements... LA - eng PB - American Physical Society TI - Inference of the Mass Composition of Cosmic Rays with Energies from 10^18.5 to 10^20  eV Using the Pierre Auger Observatory and Deep Learning DO - 10.1103/PhysRevLett.134.021001 ER -