Isentropic evolution of the matter in heavy-ion collisions and the search for the critical endpoint Mario Motta, Rainer Stiele, Wanda Maria Alberico and Andrea Beraudo Eur. Phys. J. C, 80 8 (2020) 770 Published online: 25 August 2020 DOI: 10.1140/epjc/s10052-020-8218-x