Measurement of the Decays B → φ K and B → φ K

• Published in: Physical review letters Vol. 87; no. 15; pp. 151801 - 1-151801-7
• Main Authors: Aubert, B., Boutigny, D., Gaillard, J.-M., Hicheur, A., Karyotakis, Y., Lees, J. P., Robbe, P., Tisserand, V., Palano, A., Chen, G. P., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Reinertsen, P. L., Stugu, B., Abbott, B., Abrams, G. S., Borgland, A. W., Breon, A. B., Brown, D. N., Button-Shafer, J., Cahn, R. N., Clark, A. R., Fan, Q., Gill, M. S., Gowdy, S. J., Gritsan, A., Groysman, Y., Jacobsen, R. G., Kadel, R. W., Kadyk, J., Kerth, L. T., Kluth, S., Kolomensky, Yu. G., Kral, J. F., LeClerc, C., Levi, M. E., Liu, T., Lynch, G., Meyer, A. B., Momayezi, M., Oddone, P. J., Perazzo, A., Pripstein, M., Roe, N. A., Romosan, A., Ronan, M. T., Shelkov, V. G., Telnov, A. V., Wenzel, W. A., Bright-Thomas, P. G., Harrison, T. J., Hawkes, C. M., Kirk, A., Knowles, D. J., O'Neale, S. W., Penny, R. C., Watson, A. T., Watson, N. K., Deppermann, T., Koch, H., Krug, J., Kunze, M., Lewandowski, B., Peters, K., Schmuecker, H., Steinke, M., Andress, J. C., Barlow, N. R., Bhimji, W., Chevalier, N., Clark, P. J., Cottingham, W. N., De Groot, N., Dyce, N., Foster, B., Mass, A., McFall, J. D., Wallom, D., Wilson, F. F., Abe, K., Hearty, C., Mattison, T. S., McKenna, J. A., Thiessen, D., Camanzi, B., Jolly, S., McKemey, A. K., Tinslay, J., Blinov, V. E., Bukin, A. D., Bukin, D. A., Buzykaev, A. R., Dubrovin, M. S., Golubev, V. B., Ivanchenko, V. N., Korol, A. A.
• Format: Journal Article
• Language: English
• Published: American Physical Society 08-10-2001
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.87.151801

We have observed the decays B-->phi K and phi K^* in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are BF(B^+ --> phi K^+) = (7.7^{+1.6}_{-1.4}+/- 0.8) x 10^{-6}, BF(B^0 --> phi K^0) = (8.1^{+3.1}_{-2.5}+/- 0.8) x 10^{-6}, BF(B^+ --> phi K^{*+}) = (9.7^{+4.2}_{-3.4}+/- 1.7) x 10^{-6} and BF(B^0 --> phi K^{*0}) = (8.6^{+2.8}_{-2.4}+/- 1.1) x 10^{-6}. We also report the upper limit BF(B^+ --> phi pi^+) 1.4 x 10^{-6}$ (90% CL).