We study the decays B+-->eta(c)K(+) and B-0-->eta(c)K(0), where the eta(c) is reconstructed in the K(S)(0)K(+/-)pi(-/+) and K(+)K(-)pi(0) decay modes. Results are based on a sample of 86 million B (B) over bar pairs collected with the BABAR detector at the SLAC e(+)e(-) B Factory. We measure the product of branching fractions B(B+-->eta(c)K(+))xB(eta(c)-->K (K) over bar pi)=(7.40+/-0.50+/-0.70)x10(-5) and B(B-0-->eta(c)K(0))xB(eta(c)-->K (K) over bar pi)=(6.48+/-0.85+/-0.71)x10(-5), where the first error is statistical and the second is systematic. In addition, we search for B-->eta(c)K events with eta(c)-->2(K+K-) and eta(c)-->phiphi and determine the eta(c) decay branching fraction ratios B(eta(c)-->2(K+K-))/B(eta(c)-->K (K) over bar pi)=(2.3+/-0.7+/-0.6)x10(-2) and B(eta(c)-->phiphi)/B(eta(c)-->K (K) over bar pi)=(5.5+/-1.4+/-0.5)x10(-2).

Branching fraction measurements of B ->eta K-c decays / Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, Jm; Hicheur, A; Karyotakis, Y; Lees, Jp; Tisserand, V; Zghiche, A; Palano, A; Pompili, A; Chen, Jc; Qi, Nd; Rong, G; Wang, P; Zhu, Ys; Eigen, G; Ofte, I; Stugu, B; Abrams, Gs; Borgland, Aw; Breon, Ab; Brown, Dn; BUTTON SHAFER, J; Cahn, Rn; Charles, E; Day, Ct; Gill, Ms; Gritsan, Av; Groysman, Y; Jacobsen, Rg; Kadel, Rw; Kadyk, J; Kerth, Lt; Kolomensky, Yg; Kukartsev, G; Leclerc, C; Levi, Me; Lynch, G; Mir, Lm; Oddone, Pj; Orimoto, Tj; Pripstein, M; Roe, Na; Ronan, Mt; Shelkov, Vg; Telnov, Av; Wenzel, Wa; Ford, K; Harrison, Tj; Hawkes, Cm; Morgan, Se; Watson, At; Watson, Nk; Fritsch, M; Goetzen, K; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Steinke, M; Boyd, Jt; Chevalier, N; Cottingham, Wn; Kelly, Mp; Latham, Te; Wilson, Ff; Abe, K; CUHADAR DONSZELMANN, T; Hearty, C; Mattison, Ts; Mckenna, Ja; Thiessen, D; Kyberd, P; Teodorescu, L; Blinov, Ve; Bukin, Ad; Druzhinin, Vp; 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Branching fraction measurements of B ->eta K-c decays

DEL RE, Daniele;RAHATLOU, SHAHRAM;SARTI, ALESSIO;BELLINI, Fabio;CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;
2004

Abstract

We study the decays B+-->eta(c)K(+) and B-0-->eta(c)K(0), where the eta(c) is reconstructed in the K(S)(0)K(+/-)pi(-/+) and K(+)K(-)pi(0) decay modes. Results are based on a sample of 86 million B (B) over bar pairs collected with the BABAR detector at the SLAC e(+)e(-) B Factory. We measure the product of branching fractions B(B+-->eta(c)K(+))xB(eta(c)-->K (K) over bar pi)=(7.40+/-0.50+/-0.70)x10(-5) and B(B-0-->eta(c)K(0))xB(eta(c)-->K (K) over bar pi)=(6.48+/-0.85+/-0.71)x10(-5), where the first error is statistical and the second is systematic. In addition, we search for B-->eta(c)K events with eta(c)-->2(K+K-) and eta(c)-->phiphi and determine the eta(c) decay branching fraction ratios B(eta(c)-->2(K+K-))/B(eta(c)-->K (K) over bar pi)=(2.3+/-0.7+/-0.6)x10(-2) and B(eta(c)-->phiphi)/B(eta(c)-->K (K) over bar pi)=(5.5+/-1.4+/-0.5)x10(-2).
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