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- W3111934595 abstract "The rare decay $K_L !to! pi^0 nu overline{nu}$ was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of $( 7.20 pm 0.05_{rm stat} pm 0.66_{rm syst} ) times 10^{-10}$, three candidate events were observed in the signal region. After unveiling them, contaminations from $K^{pm}$ and scattered $K_L$ decays were studied, and the total number of background events was estimated to be $1.22 pm 0.26$. We conclude that the number of observed events is statistically consistent with the background expectation. For this dataset, we set an upper limit of $4.9 times 10^{-9}$ on the branching fraction of $K_L !to! pi^0 nu overline{nu}$ at the 90% confidence level." @default.
- W3111934595 created "2020-12-21" @default.
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- W3111934595 date "2021-03-24" @default.
- W3111934595 modified "2023-10-14" @default.
- W3111934595 title "Study of the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>K</mml:mi><mml:mi>L</mml:mi></mml:msub><mml:mo stretchy=false>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>ν</mml:mi><mml:mover accent=true><mml:mi>ν</mml:mi><mml:mo stretchy=false>¯</mml:mo></mml:mover></mml:math> Decay at the J-PARC KOTO Experiment" @default.
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