Measurement of the nonlinear diffusion of the proton beam halo at the CERN LHC C. E. Montanari, R. B. Appleby, A. Bazzani, M. Giovannozzi, P. Hermes, A. Poyet, S. Redaelli and G. Sterbini Eur. Phys. J. Plus, 140 1 (2025) 86 Published online: 29 January 2025 DOI: 10.1140/epjp/s13360-025-06038-0