Search for $B^0$ decays to invisible final states at Belle

Abstract

We report a search for $B^0$ decays into invisible final states using a data sample of $657\times 10^6$ $B\bar{B}$ pairs collected at the ${\rm Y}(4S)$ 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 $1.3\times 10^{-4}$ at the 90% confidence level for the branching fraction of invisible $B^0$ decay.

arXiv comment6 pages, 5 figures (9 figure files)

References in corpus (5)

• Observation of Large CP Violation in the Neutral B Meson System
• Evidence of the Purely Leptonic Decay B- --> tau- nu_tau-bar
• Improved Measurement of Mixing-induced CP Violation in the Neutral B Meson System
• Attempts at Explaining the NuTeV Observation of Di-Muon Events
• Search for B0 Decays to Invisible Final States and to nu nubar gamma

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