Faculty and Student Publications
Document Type
Article
Publication Date
3-1-2022
Abstract
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 BB¯ pairs and was collected near the (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.
Relational Format
journal article
Recommended Citation
Hadjivasiliou, C., Fulsom, B. G., Strube, J. F., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aushev, T., Babu, V., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., Bodrov, D., Borah, J., Bozek, A., … Belle Collaboration. (2022). Search for B 0 meson decays into Λ and missing energy with a hadronic tagging method at Belle. Physical Review D, 105(5), L051101. https://doi.org/10.1103/PhysRevD.105.L051101
DOI
10.1103/PhysRevD.105.L051101
Accessibility Status
Searchable text