Freeze-in Dirac neutrinogenesis: thermal leptonic CP asymmetry Shao-Ping Li, Xin-Qiang Li, Xin-Shuai Yan and Ya-Dong Yang Eur. Phys. J. C, 80 12 (2020) 1122 Published online: 05 December 2020 DOI: 10.1140/epjc/s10052-020-08696-z