ReDecay: a novel approach to speed up the simulation at LHCb D. Müller, M. Clemencic, G. Corti and M. Gersabeck Eur. Phys. J. C, 78 12 (2018) 1009 Published online: 12 December 2018 DOI: 10.1140/epjc/s10052-018-6469-6