Observation of the baryonic B decay B0bar --> Lambda_c^+ anti-Lambda K

We report the observation of the baryonic B decay B0bar --> Lambda_c^+ anti-Lambda K- with a significance larger than 7 standard deviations based on 471x10^6$ BBbar pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B0bar --...

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Veröffentlicht in:	Physical review. D 2011-11, Vol.84 (7)
Hauptverfasser:	Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Milanes, D.A., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Brown, D.N., Kerth, L.T., Kolomensky, Yu. G., Lynch, G., Koch, H., Schroeder, T., Asgeirsson, D.J., Hearty, C., Mattison, T.S., Mckenna, J.A., So, R.Y., Khan, A., Blinov, V.E., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Kravchenko, E.A., Onuchin, A.P., Serednyakov, S.I., Skovpen, Yu. I., Solodov, E.P., Todyshev, K. Yu, Yushkov, A.N., Bondioli, M., Kirkby, D., Lankford, A.J., Mandelkern, M., Stoker, D.P., Atmacan, H., Gary, J.W., Liu, F., Long, O., Vitug, G.M., Campagnari, C., Hong, T.M., Kovalskyi, D., Richman, J.D., West, C.A., Eisner, A.M., Kroseberg, J., Lockman, W.S., Martinez, A.J., Schalk, T., Schumm, B.A., Seiden, A., Cheng, C.H., Doll, D.A., Echenard, B., Flood, K.T., Hitlin, D.G., Ongmongkolkul, P., Porter, F.C., Rakitin, A.Y., Andreassen, R., Dubrovin, M.S., Huard, Z., Meadows, B.T., Sokoloff, M.D., Sun, L., Bloom, P.C., Ford, W.T., Gaz, A., Nagel, M., Nauenberg, U., Smith, J.G., Wagner, S.R., Ayad, R., Toki, W.H., Spaan, B., Kobel, M.J., Schubert, K.R., Schwierz, R., Bernard, D., Verderi, M., Clark, P.J., Playfer, S., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Munerato, M., Negrini, M., Piemontese, L., Santoro, V., Baldini-Ferroli, R., Calcaterra, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	DECAY Experiment-HEP,HEPEX High Energy Physics - Experiment MASS DISTRIBUTION PARTICLE ACCELERATORS Physics STANFORD LINEAR ACCELERATOR CENTER STORAGE RINGS
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Beschreibung
Zusammenfassung:	We report the observation of the baryonic B decay B0bar --> Lambda_c^+ anti-Lambda K- with a significance larger than 7 standard deviations based on 471x10^6$ BBbar pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B0bar --> Lambda_c^+ anti-Lambda K- to be (3.8 \pm 0.8_{stat} \pm 0.2_{sys} \pm 1.0_{Lambda_c^+})x10^{-5}. The uncertainties are statistical, systematic, and due to the uncertainty in the Lambda_c^+ branching fraction. We find that the Lambda_c^+ K^- invariant mass distribution shows an enhancement above 3.5 GeV/c^2.
ISSN:	2470-0010 1550-7998 2470-0029 1550-2368
DOI:	10.1103/PhysRevD.84.071102