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- W3589766 abstract "We present the first evidence for B+ → τ+ντ decay, using 414 fb−1 of B meson decay event sample collected with the Belle detector at the KEKB e+e− collider. To cope with large missing energy due to multiple neutrinos in the final state, events are tagged by fully reconstructing one of the B mesons. We find the evidence for signal with a significance of 3.5 σ including systematic uncertainties. The branching fraction is measured to be B(B+ → τ+ντ) = (1.79−0.49−0.51+0.56+0.46) × 10−4. From this we obtain fB = 0.229−0.031−0.037+0.036+0.034 GeV, the first direct determination of the B meson decay constant." @default.
- W3589766 created "2016-06-24" @default.
- W3589766 creator A5011111291 @default.
- W3589766 date "2007-01-01" @default.
- W3589766 modified "2023-09-25" @default.
- W3589766 title "Evidence for B+ → τ+ντ decays and measurement of fB from Belle" @default.
- W3589766 doi "https://doi.org/10.1063/1.2714406" @default.
- W3589766 hasPublicationYear "2007" @default.
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