A theoretical study of top-mass measurements at the LHC using NLO+PS generators of increasing accuracy Silvia Ferrario Ravasio, Tomáš Ježo, Paolo Nason and Carlo Oleari Eur. Phys. J. C, 78 6 (2018) 458 Published online: 07 June 2018 DOI: 10.1140/epjc/s10052-018-5909-7