Pileup mitigation at the Large Hadron Collider with graph neural networks J. Arjona Martínez, O. Cerri, M. Spiropulu, J. R. Vlimant and M. Pierini Eur. Phys. J. Plus, 134 7 (2019) 333 Published online: 17 July 2019 DOI: 10.1140/epjp/i2019-12710-3