Mar 24, 2021
Study of the KL→π0νν¯ Decay at the J-PARC KOTO Experiment
Physical Review Letters
- Volume
- 126
- Number
- 12
- First page
- 121801
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/physrevlett.126.121801
- Publisher
- American Physical Society (APS)
The rare decay KL was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of (7.20±0.05stat±0.66syst)×10-10, three candidate events were observed in the signal region. After unveiling them, contaminations from K± and scattered KL decays were studied, and the total number of background events was estimated to be 1.22±0.26. We conclude that the number of observed events is statistically consistent with the background expectation. For this dataset, we set an upper limit of 4.9×10-9 on the branching fraction of KL→ π0ν ν at the 90% confidence level.
- Link information
-
- DOI
- https://doi.org/10.1103/physrevlett.126.121801
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/33834796
- URL
- https://link.aps.org/article/10.1103/PhysRevLett.126.121801
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.126.121801/fulltext
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85103521442&origin=inward Open access
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85103521442&origin=inward
- ID information
-
- DOI : 10.1103/physrevlett.126.121801
- ISSN : 0031-9007
- eISSN : 1079-7114
- Pubmed ID : 33834796
- SCOPUS ID : 85103521442