Baryon number fluctuations and the phase structure in the PNJL model Guo-yun Shao, Zhan-duo Tang, Xue-yan Gao and Wei-bo He Eur. Phys. J. C, 78 2 (2018) 138 Published online: 19 February 2018 DOI: 10.1140/epjc/s10052-018-5636-0