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Study of B Decays to Charmonium States: B-->eta(c)K and B --> chi(c0)K |
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| Authors: | Edwards Janicek Patel Sadoff Ammar Bean Besson Davis Kwak Zhao Anderson Frolov Kubota Lee Mahapatra O'Neill Poling Riehle Smith Stepaniak Urheim Ahmed Alam Athar Jian Ling Saleem Timm Wappler Anastassov Duboscq Eckhart Gan Gwon Hart Honscheid Hufnagel Kagan Kass Pedlar Schwarthoff Thayer von Toerne E Zoeller Richichi Severini Skubic Undrus Chen Fast Hinson Lee Miller Shibata Shipsey Pavlunin Cronin-Hennessy Lyon Thorndike Jessop Marsiske Perl Savinov Ugolini Zhou Coan Fadeyev Maravin Narsky Stroynowski Ye Wlodek Artuso |
| Affiliation: | Carleton University, Ottawa, Ontario, Canada K1S 5B6 and and the Institute of Particle Physics, Canada. |
| Abstract: | In a sample of 9.66x10(6)B&Bmacr; pairs collected with the CLEO detector we make the first observation of B decays to an eta(c) and a kaon. We measure branching fractions B(B+-->eta(c)K+) = (0.69(+0.26)(-0.21)+/-0.08+/-0.20)x10(-3) and B(B degrees -->eta(c)K degrees ) = (1.09(+0.55)(-0.42)+/-0.12+/-0.31)x10(-3), where the first error is statistical, the second is systematic, and the third is from the eta(c) branching fraction uncertainty. From these we extract the eta(c) decay constant in the factorization approximation, f(eta(c)) = 335+/-75 MeV. We also search for B decays to a chi(c0) and a kaon. No evidence for a signal is found and we set 90% C.L. upper limits: B(B+-->chi(c0)K+)<4.8x10(-4) and B(B degrees -->chi(c0)K degrees )<5.0x10(-4). |
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