Publikace na Matematicko-fyzikální fakulta |
2012
Abstrakt
We report a search for B-0 decays into invisible final states using a data sample of 657 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+) e(-) collider. The signal is identified by fully reconstructing a hadronic decay of the accompanying B meson and requiring no other particles in the event.
No significant signal is observed, and we obtain an upper limit of 1.3 x 10(-4) at the 90% confidence level for the branching fraction of invisible B-0 decay.