Abstract
We present the first observation of the decay B →J/ψϕK Using 9.6 ×106BB¯meson pairs collected with the CLEO detector, we have observed ten fully reconstructed B →J/ψϕK candidates, whereas the estimated background is 0.5 ±0.2event. We obtain a branching fraction of B(B →J/ψϕK)=(8.8−3.0+3.5[stat]±1.3[syst])×10−5This is the first observed B meson decay requiring the creation of an additional ss¯quark pair.
Original language | English (US) |
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Pages (from-to) | 1393-1397 |
Number of pages | 5 |
Journal | Physical review letters |
Volume | 84 |
Issue number | 7 |
DOIs | |
State | Published - 2000 |