An analysis of the impact of LHC Run I proton–lead data on nuclear parton densities Néstor Armesto, Hannu Paukkunen, José Manuel Penín, Carlos A. Salgado and Pía Zurita Eur. Phys. J. C, 76 4 (2016) 218 Published online: 21 April 2016 DOI: 10.1140/epjc/s10052-016-4078-9