$Study of the B − → J / ψ K − π + π − decay and measurement of the B − → X ( 3872 ) K − branching fraction$

Study of the B − → J / ψ K − π + π − decay and measurement of the B − → X ( 3872 ) K − branching fraction

We study the decay B- --> J/psi K- pi+ pi- using 117 million BBbar events collected at the Y(4S) resonance with the BaBar detector at the PEP-II e+ e- asymmetric-energy storage ring. We measure the branching fractions Br(B- --> J/psi K- pi+ pi-) = (116 +- 7 (stat.) +- 9(syst.))* 10-5 and Br(B-...

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Veröffentlicht in:	Physical review. D 2005-04, Vol.71 (7), Article 071103
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., Lynch, G., Merchant, A. M., Mir, L. M., Oddone, P. J., Orimoto, T. J., Pripstein, M., Roe, N. A., Ronan, M. T., Shelkov, V. G., Wenzel, W. A., Ford, K., Harrison, T. J., Hawkes, C. M., Morgan, S. E., Watson, A. T., 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., Cuhadar-Donszelmann, T., Hearty, C., Knecht, N. S., Mattison, T. S., McKenna, J. A., Thiessen, D., Khan, A., 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., Shen, B. C.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
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Zusammenfassung:	We study the decay B- --> J/psi K- pi+ pi- using 117 million BBbar events collected at the Y(4S) resonance with the BaBar detector at the PEP-II e+ e- asymmetric-energy storage ring. We measure the branching fractions Br(B- --> J/psi K- pi+ pi-) = (116 +- 7 (stat.) +- 9(syst.))* 10-5 and Br(B- --> X(3872)K-)* Br (X(3872) --> J/psi pi+ pi-) =(1.28+- 0.41)* 10-5 and find the mass of the X(3872) to be 3873.4 +- 1.4 MeV/c2. We search for the h_c narrow state in the decay B- --> h_c K-, h_c --> J/psi pi+ pi- and for the decay B- --> J/psi D0 pi-, with D0 --> K- pi+. We set the 90% C.L. limits Br(B- --> h_c K-)* Br (h_c --> J/psi pi+ pi-) J/psi D0 pi-)
ISSN:	1550-7998 2470-0010 1550-2368 2470-0029
DOI:	10.1103/PhysRevD.71.071103