Study of the decay \(\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}\) and its intermediate states

• Published in: arXiv.org
• Main Authors: 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
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 28.03.2013
• Subjects: Baryons; Decay; Quarks; Storage rings (particle accelerators); Uncertainty
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1302.0191

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.