Article ; Online: Study of the K_{L}→π^{0}νν[over ¯] Decay at the J-PARC KOTO Experiment.
2021 Volume 126, Issue 12, Page(s) 121801
Abstract: The rare decay K_{L}→π^{0}νν[over ¯] was studied with the dataset taken at the J-PARC KOTO ... and scattered K_{L} decays were studied, and the total number of background events was estimated to be ... with the background expectation. For this dataset, we set an upper limit of 4.9×10^{-9} on the branching fraction of K ...
Abstract | The rare decay K_{L}→π^{0}νν[over ¯] 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±0.05_{stat}±0.66_{syst})×10^{-10}, three candidate events were observed in the signal region. After unveiling them, contaminations from K^{±} and scattered K_{L} 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 K_{L}→π^{0}νν[over ¯] at the 90% confidence level. |
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Language | English |
Publishing date | 2021-03-23 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 208853-8 |
ISSN | 1079-7114 ; 0031-9007 |
ISSN (online) | 1079-7114 |
ISSN | 0031-9007 |
DOI | 10.1103/PhysRevLett.126.121801 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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