We report on a search for heavy neutrinos in -meson decays. The results are obtained using a data sample that contains pairs collected at the resonance with the Belle detector at the KEKB asymmetric-energy 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 .
DOI:https://doi.org/10.1103/PhysRevD.87.071102
© 2013 American Physical Society
Distributions of for , and reconstruction modes in (a) generic MC (unscaled), and (b) data. The dotted line shows the boundary between the small mass and large mass methods. The filled (black) histograms are for candidates with opposite-charge leptons, while the open (white) histograms are for candidates with same-charge leptons.
Reuse & PermissionsUpper limits at 90% C.L. on (a) the number of signal events and (b) , and . The dotted line shows the boundary between the small mass and large mass methods.
Reuse & Permissions
