Observation and study of the baryonic B-meson decays B to D(*) p pbar (pi) (pi)

We present results for B-meson decay modes involving a charm meson, protons, and pions using 455×106 BBpairs recorded by the BaBar detector at the SLAC PEP-II asymmetric-energy e+ecollider. The branching fractions are measured for the following ten decays: B0→D0pp, B0→D*0pp , B 0→D+pp -, B 0→D*+pp -, B-→D0pp -, B-→D*0pp -, B 0→D0pp -+, B 0→D*0pp -+, B→D+pp --, and B-→D*+pp --. The four Band the two five-body B0 modes are observed for the first time. The four-body modes are enhanced compared to the threeand the five-body modes. In the three-body modes, the M(pp) and M(D(*)0p) invariant-mass distributions show enhancements near threshold values. In the four-body mode B0→D+pp-, the M(p-) distribution shows a narrow structure of unknown origin near 1.5 GeV/c2. The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions. DOI: https://doi.org/10.1103/PhysRevD.85. 092017 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-75132 Journal Article Originally published at: BABAR Collaboration; Snoek, H (2012). Observation and study of the baryonic B-meson decays B to D(*) p pbar (pi) (pi). Physical Review D (Particles, Fields, Gravitation and Cosmology), 85(9):092017. DOI: https://doi.org/10.1103/PhysRevD.85. 092017 ar X iv :1 11 1. 43 87 v1 [ he pex ] 1 8 N ov 2 01 1 SLAC-PUB-14763 BABAR-PUB-10/019 Observation and study of the baryonic B-meson decays B→Dpp(π)(π) P. del Amo Sanchez, J. P. Lees, V. Poireau, E. Prencipe, and V. Tisserand Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France J. Garra Tico and E. Grauges Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain M. Martinelli, A. Palano, and M. Pappagallo INFN Sezione di Bari; Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy G. Eigen, B. Stugu, and L. Sun University of Bergen, Institute of Physics, N-5007 Bergen, Norway M. Battaglia, D. N. Brown, B. Hooberman, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, I. L. Osipenkov, and T. Tanabe Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA C. M. Hawkes and A. T. Watson University of Birmingham, Birmingham, B15 2TT, United Kingdom H. Koch and T. Schroeder Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany D. J. Asgeirsson, C. Hearty, T. S. Mattison, and J. A. McKenna University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 A. Khan and A. Randle-Conde Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, K. Yu. Todyshev, and A. N. Yushkov Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia M. Bondioli, S. Curry, D. Kirkby, A. J. Lankford, M. Mandelkern, E. C. Martin, and D. P. Stoker University of California at Irvine, Irvine, California 92697, USA H. Atmacan, J. W. Gary, F. Liu, O. Long, and G. M. Vitug University of California at Riverside, Riverside, California 92521, USA C. Campagnari, J. M. Flanigan, T. M. Hong, D. Kovalskyi, J. D. Richman, and C. West University of California at Santa Barbara, Santa Barbara, California 93106, USA A. M. Eisner, C. A. Heusch, J. Kroseberg, W. S. Lockman, A. J. Martinez, T. Schalk, B. A. Schumm, A. Seiden, and L. O. Winstrom University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA C. H. Cheng, D. A. Doll, B. Echenard, D. G. Hitlin, P. Ongmongkolkul, F. C. Porter, and A. Y. Rakitin California Institute of Technology, Pasadena, California 91125, USA R. Andreassen, M. S. Dubrovin, G. Mancinelli, B. T. Meadows, and M. D. Sokoloff University of Cincinnati, Cincinnati, Ohio 45221, USA P. C. Bloom, W. T. Ford, A. Gaz, M. Nagel, U. Nauenberg, J. G. Smith, and S. R. Wagner