| Abstract |
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We present results for B-meson decay modes involving a charm
meson, protons, and pions using 455 x 10^6 BBbar 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:
B0bar to D0 p pbar,
B0bar to D*0 p pbar,
B0bar to D+ p pbar pi-,
B0bar to D*+ p pbar pi-,
B- to D0 p pbar pi-,
B- to D*0 p pbar pi-,
B0bar to D0 p pbar pi- pi+,
B0bar to D*0 p pbar pi- pi+,
B- to D+ p pbar pi- pi-,
and
B- to D*+ p pbar pi- pi-,
The four B- and the two five-body B0bar 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(p pbar) and M(D(*)0 p) invariant mass
distributions show enhancements near threshold values. In the
four-body mode B0bar to D+ p pbar pi-, the
M(p pi-) distribution shows a narrow structure of unknown
origin near 1.5 GeV/c^2. The distributions for the five-body
modes, in contrast to the others, are similar to the expectations
from uniform phase-space predictions.
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