Key points are not available for this paper at this time.
We report on a search for heavy neutrinos in B-meson decays. The results are obtained using a data sample that contains 77210^6BB pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. No signal is observed and upper limits are set on mixing of heavy neutrinos with left-handed neutrinos of the Standard Model in the mass range 0. 5--5. 0 GeV/c^2.
Liventsev et al. (Mon,) studied this question.