Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-Body Charmful Baryonic B Decays $\bar B\to D(D^*)N\bar N$   We study the charmful three-body baryonic B decays $\bar B\to D^{(*)}N\bar
N$: the color-allowed modes $\bar B^0\to D^{(*)+}n\bar p$ and the
color-suppressed ones $\bar B^0\to D^{(*)0}p\bar p$. While the $D^{*+}/D^+$
production ratio is predicted to be of order 3, it is found that $D^0p\bar p$
has a similar rate as $D^{*0}p\bar p$. It is pointed out that $\bar B^0\to
D(D^*)N\bar N$ are dominated by the nucleon vector current or by vector meson
intermediate states, whereas $\bar B^0\to D^0p\bar p$ proceeds mainly via the
exchange of the axial-vector intermediate state $a_1(1260)$. The study of the
$N\bar N$ invariant mass distribution in general indicates a threshold baryon
pair production; that is, a recoil charmed meson accompanied by a low mass
baryon pair except that the spectrum of $D^0p\bar p$ has a hump at large $p\bar
p$ invariant mass $m_{p\bar p}\sim 3.0$ GeV.

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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an