Branching fraction measurements of B → η c K decays

Branching fraction measurements of B → η c K decays

We study the decays B+ -> etac K+ and B0 -> etac K0, where the etac is reconstructed in the Ks K+ pi- and K+ K- pi0 decay modes. Results are based on a sample of 86 million BBbar pairs collected with the BaBar detector at the SLAC e+e- B Factory. We measure the branching fractions BR(B+ ->...

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Veröffentlicht in:Physical review. D 2004-07, Vol.70 (1), Article 011101
Hauptverfasser: Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J.-M., Hicheur, A., Karyotakis, Y., Lees, J. P., Tisserand, V., Zghiche, A., Palano, A., Pompili, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., Stugu, B., Abrams, G. S., Borgland, A. W., Breon, A. B., Brown, D. N., Button-Shafer, J., Cahn, R. N., Charles, E., Day, C. T., Gill, M. S., Gritsan, A. V., Groysman, Y., Jacobsen, R. G., Kadel, R. W., Kadyk, J., Kerth, L. T., Kolomensky, Yu. G., Kukartsev, G., LeClerc, C., Levi, M. E., Lynch, G., Mir, L. M., Oddone, P. J., Orimoto, T. J., Pripstein, M., Roe, N. A., Ronan, M. T., Shelkov, V. G., Telnov, A. V., Wenzel, W. A., Ford, K., Harrison, T. J., Hawkes, C. M., Morgan, S. E., Watson, A. T., Watson, N. K., Fritsch, M., Goetzen, K., Held, T., Koch, H., Lewandowski, B., Pelizaeus, M., Steinke, M., Boyd, J. T., Chevalier, N., Cottingham, W. N., Kelly, M. P., Latham, T. E., Wilson, F. F., Abe, K., Cuhadar-Donszelmann, T., Hearty, C., Mattison, T. S., McKenna, J. A., Thiessen, D., Kyberd, P., Teodorescu, L., Blinov, V. E., Bukin, A. D., Druzhinin, V. P., Golubev, V. B., Ivanchenko, V. N., Kravchenko, E. A., Onuchin, A. P., Serednyakov, S. I., Skovpen, Yu. I., Solodov, E. P., Yushkov, A. N., Best, D., Bruinsma, M., Chao, M., Eschrich, I., Kirkby, D., Lankford, A. J., Mandelkern, M., Mommsen, R. K., Roethel, W., Stoker, D. P., Buchanan, C., Hartfiel, B. L., Gary, J. W.
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Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:We study the decays B+ -> etac K+ and B0 -> etac K0, where the etac is reconstructed in the Ks K+ pi- and K+ K- pi0 decay modes. Results are based on a sample of 86 million BBbar pairs collected with the BaBar detector at the SLAC e+e- B Factory. We measure the branching fractions BR(B+ -> etac K+) = (1.34 +/- 0.09 +/- 0.13 +/- 0.41) x 10^{-3} and BR(B0 -> etac K0) = (1.18 +/- 0.16 +/- 0.13 +/- 0.37) x 10^{-3}, where the first error is statistical, the second is systematic, and the third reflects the etac branching fraction uncertainty. In addition, we search for B -> etac K events with etac -> 2(K+K-) and etac -> phi phi and determine the etac decay branching fraction ratios BR(etac -> 2(K+K-))/BR(etac -> K Kbar pi) = (2.3 +/- 0.7 +/- 0.6) x 10^{-2} and BR(etac -> phi phi)/BR(etac -> K Kbar pi) = (5.5 +/- 1.4 +/- 0.5) x 10^{-2}.
ISSN:1550-7998
2470-0010
1550-2368
2470-0029
DOI:10.1103/PhysRevD.70.011101