Exploring CP-violation, via heavy neutrino oscillations, in rare B meson decays at Belle II

Abstract

In this article we study the rare B-meson decay via two on-shell almost-degenerate Majorana Heavy Neutrinos, into two charged leptons and two pseudoscalar mesons (B^{pm } rightarrow D^0 ell ^{pm }_1 ell ^{pm }_2 pi ^{mp }). We consider the scenario where the heavy neutrino masses are sim 2 GeV and the heavy-light mixing coefficients are |B_{ell N}|^2 sim 10^{-5}, and evaluate the possibility to measure the CP-asymmetry at Belle II. We present some realistic conditions under which the asymmetry could be detected.