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Tisserand, V; Schroeder, T; Asgeirsson, D J; Buzykaev, A R; Skovpen, Yu I; Lankford, A J; Kovalskyi, D; Eisner, A M; Lockman, W S; Schumm, B A; Flood, K T; Ongmongkolkul, P; Porter, F C; Andreassen, R; Huard, Z; Sun, L; d, W T; Gaz, A; Smith, J G; Ayad, R; Spaan, B; Schwierz, R; Verderi, M; Bettoni, D; Calcaterra, A; de Sangro, R; Contri, R; M Lo Vetere; Robutti, E; Morii, M; Adametz, A; Uwer, U; Cochran, J; Meyer, W T; Arnaud, N; Davier, M; Grosdidier, G; Lutz, A M; Stocchi, A; Wormser, G; Lange, D J; Gabathuler, E; Payne, D J; Bevan, A J; F Di Lodovico; Sacco, R; Sigamani, M; Cowan, G; Davis, C L; Denig, A G; Gradl, W; Sciolla, G; Lindemann, D; Neri, N; Palombo, F; Kroeger, R; Simard, M; De Nardo, G; Jessop, C P; Brau, J; Strom, D; Torrence, E; Simonetto, F; Hamon, O; ti, F; Giorgi, M A; Smith, A J S; Faccini, R; Ferroni, F; Voß, C; Vasseur, G; Ch Y\`; Convery, M R; Ebert, M; M Franco Sevilla; Grenier, P; D W G S Leith; Luitz, S; Perl, M; Schindler, R H; Snyder, A; Wright, D H; Young, C C; Park, W; Alam, M S; Guttman, N; Ruland, A M; Izen, J M; Oyanguren, A; Ahmed, H; Albert, J; Banerjee, Sw; Bernlochner, F U; Nugent, I M; Sobie, R J; Tasneem, N; Harrison, P F; Latham, T E; Band, H R; Wu, S L
arXiv.org, 03/2013Paper
We study the decay \(\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}\), reconstructing the \Lambda_{c}^{+} baryon in the \(p K^{-}\pi^{+}\) mode, using a data sample of \(467\times 10^{6}\) \(B\bar{B}\) pairs collected with the BaBar detector at the PEP-2 storage rings at SLAC. We measure branching fractions for decays with intermediate \(\Sigma_{c}\) baryons to be \({\cal B}\bar{B}^{0}\rightarrow\Sigma_{c}(2455)^{++}\bar{p}\pi^{-}=(21.3 \pm 1.0 \pm 1.0 \pm 5.5) \times 10^{-5}\), \({\cal B}\bar{B}^{0}\rightarrow\Sigma_{c}(2520)^{++}\bar{p}\pi^{-}=(11.5\pm 1.0 \pm 0.5 \pm 3.0)\times 10^{-5}\), \({\cal B}\bar{B}^{0}\rightarrow\Sigma_{c}(2455)^{0}\bar{p}\pi^{+}=(9.1 \pm 0.7 \pm 0.4 \pm 2.4)\times10^{-5}\), and \({\cal B}\bar{B}^{0}\rightarrow\Sigma_{c}(2520)^{0}\bar{p}\pi^{+}= (2.2 \pm 0.7 \pm 0.1\pm 0.6) \times 10^{-5}\), where the uncertainties are statistical, systematic, and due to the uncertainty on the \(\Lambda_{c}^{+}\rightarrow\proton\Km\pi^{+}\) branching fraction, respectively. For decays without \(\Sigma_{c}(2455)\) or \(\Sigma_{c}(2520)\) resonances, we measure \({\cal B}\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}_{\mathrm{non-\Sigma_{c}}}=(79 \pm 4 \pm 4 \pm 20)\times10^{-5}\). The total branching fraction is determined to be \({\cal B}\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}_{\mathrm{total}}=(123 \pm 5 \pm 7 \pm 32)\times10^{-5}\). We examine multibody mass combinations in the resonant three-particle \(\Sigma_{c}\bar{p}\pi\) final states and in the four-particle \(\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}\) final state, and observe different characteristics for the \(\bar{p}\pi\) combination in neutral versus doubly-charged \(\Sigma_{c}\) decays.
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