Exploring CP-violation, via heavy neutrino oscillations, in rare B meson decays at Belle II Gorazd Cvetič, C. S. Kim, Sebastian Mendizabal and Jilberto Zamora-Saá Eur. Phys. J. C, 80 11 (2020) 1052 Published online: 16 November 2020 DOI: 10.1140/epjc/s10052-020-08625-0