We present results for B-meson decay modes involving a charm meson, protons, and pions using 455×106 BB̄ pairs recorded by the BaBar detector at the SLAC PEP-II asymmetric-energy e +e - collider. The branching fractions are measured for the following ten decays: B ̄0→D0pp̄, B ̄0→D *0pp̄, B ̄0→D +pp̄π -, B ̄0→D *+pp̄π -, B -→D0pp̄π -, B -→D *0pp̄π -, B ̄0→D0pp̄π -π +, B ̄0→D *0pp̄π -π +, B -→D +pp̄π -π -, and B -→D *+pp̄π -π -. The four B - and the two five-body B ̄0 modes are observed for the first time. The four-body modes are enhanced compared to the three- and the five-body modes. In the three-body modes, the M(pp̄) and M(D(*)0p) invariant-mass distributions show enhancements near threshold values. In the four-body mode B ̄0→D +pp̄π -, the M(pπ -) distribution shows a narrow structure of unknown origin near 1.5GeV/c2. The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions. © 2012 American Physical Society.

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C. Please note that version 3 on the archive is the auxiliary version of the Physics of the B Factories book. This uses the notation alpha, beta, gamma for the angles of the Unitarity Triangle. The nominal version uses the notation phi_1, phi_2 and phi_3. Please cite this work as Eur. Phys. J. C74 (2014) 3026.