This title appears in the Scientific Report :
2022
Please use the identifier:
http://hdl.handle.net/2128/32617 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.105.L051101 in citations.
Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle
Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle
We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb−1 data sample that contains 772×106 B¯B pairs and was collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e−...
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Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.105.L051101 in citations.
We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb−1 data sample that contains 772×106 B¯B pairs and was collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90% confidence level upper limits on the branching fractions in the range 2.1–3.8×10−5. This measurement provides the world’s most restrictive limits, with implications for baryogenesis and dark matter production. |