Euclid preparation - XXXIX. The effect of baryons on the halo mass function Euclid Collaboration, T. Castro, S. Borgani, M. Costanzi, J. Dakin, K. Dolag, A. Fumagalli, A. Ragagnin, A. Saro, A. M. C. Le Brun et al. (213 more) A&A, 685 (2024) A109 Published online: 14 May 2024 DOI: 10.1051/0004-6361/202348388