Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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 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.

28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs