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Article

Search for B0 decays to invisible final states (+γ) at Belle

Аушев Т. А., Mizuk R., Pakhlov P., Pakhlova G., Углов Т. В., Попов В. Е.

We report searches for B0→invisible and B0→invisible+γ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained from a 711 fb-1 data sample that contains 772×106BB¯ pairs and was collected near the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. We observe no significant signal for either decay and set upper limits on their branching fractions at 90% confidence level of B(B0→invisible)<7.8×10-5 and B(B0→invisible+γ)<1.6×10-5. © 2020 authors.