Revisiting the role of CP-conserving processes in cosmological particle–antiparticle asymmetries Avirup Ghosh, Deep Ghosh and Satyanarayan Mukhopadhyay Eur. Phys. J. C, 81 11 (2021) 1038 Published online: 26 November 2021 DOI: 10.1140/epjc/s10052-021-09848-5