Study of the KL→π0νν¯ Decay at the J-PARC KOTO Experiment
APS, 2021
Online
academicJournal
- 7
Zugriff:
The rare decay KL→π0νν¯ 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→π0νν¯ at the 90% confidence level.
| Titel: |
Study of the KL→π0νν¯ Decay at the J-PARC KOTO Experiment
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| Autor/in / Beteiligte Person: | Ahn, J. K. ; Beckford, B. ; Campbell, M. ; Chen, S. H. ; Comfort, J. ; Dona, K. ; Farrington, M. S. ; Hanai, K. ; Hara, N. ; Haraguchi, H. ; Hsiung, Y. B. ; Hutcheson, M. ; Inagaki, T. ; Isoe, M. ; Kamiji, I. ; Kato, T. ; Kim, E. J. ; Kim, J. L. ; Kim, H. M. ; Komatsubara, T. K. ; Kotera, K. ; Lee, S. K. ; Lee, J. W. ; Lim, G. Y. ; Lin, Q. S. ; Lin, C. |
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| Veröffentlichung: | APS, 2021 |
| Medientyp: | academicJournal |
| Umfang: | 7 |
| DOI: | 10.1103/PhysRevLett.126.121801 |
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