@article{5bb69bb6e59f406290043d4b56fdaff9,
title = "First Observation of the Decay B →J/ψϕK",
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.",
author = "{CLEO Collaboration} and A. Anastassov and Duboscq, {J. E.} and Gan, {K. K.} and C. Gwon and T. Hart and K. Honscheid and D. Hufnagel and H. Kagan and R. Kass and J. Lorenc and Pedlar, {T. K.} and H. Schwarthoff and {von Toerne}, E. and Zoeller, {M. M.} and Richichi, {S. J.} and H. Severini and P. Skubic and A. Undrus and S. Chen and J. Fast and Hinson, {J. W.} and J. Lee and N. Menon and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P.J.} and V. Pavlunin and D. Cronin-Hennessy and Y. Kwon and Lyon, {A. L.} and Thorndike, {E. H.} and H. Marsiske and Perl, {M. L.} and V. Savinov and D. Ugolini and X. Zhou and Coan, {T. E.} and V. Fadeyev and I. Korolkov and Y. Maravin and I. Narsky and R. Stroynowski and J. Ye and T. Wlodek and M. Artuso and R. Ayad and C. Boulahouache and K. Bukin and T. Skwarnicki and S. Stone",
year = "2000",
doi = "10.1103/PhysRevLett.84.1393",
language = "English (US)",
volume = "84",
pages = "1393--1397",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "7",
}