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Full-Text Articles in Physics
Search For The Rare Decay D^{0}→Γγ At Belle, N. K. Nisar Et Al., D. Joffe
Search For The Rare Decay D^{0}→Γγ At Belle, N. K. Nisar Et Al., D. Joffe
Faculty Articles
We search for the rare radiative decay D 0 → γγ using a data sample with an integrated luminosity of 832 fb−1 recorded by the Belle detector at the KEKB e +e − asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of B(D 0 → γγ) < 8.5 × 10−7 at 90% confidence level. This is the most restrictive limit on the decay channel to date.
First Observation Of The Decay B 0 → Ψ ( 2 S ) Π 0, V. Chobanova Et Al., D. Joffe
First Observation Of The Decay B 0 → Ψ ( 2 S ) Π 0, V. Chobanova Et Al., D. Joffe
Faculty Articles
We report a measurement of the B 0 → ψ(2S)π 0 branching fraction based on the full Υ(4S) data set of 772 × 106 BB¯ pairs collected by the Belle detector at the KEKB asymmetric-energy e +e − collider. We obtain B(B 0 → ψ(2S)π 0 ) = (1.17 ± 0.17(stat) ± 0.08(syst)) × 10−5 . The result has a significance of 7.2 standard deviations and is the first observation of the decay B 0 → ψ(2S)π 0.