Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of $B^{+} \rightarrow p\bar{\Lambda} K^+ K^-$ and $B^{+}
  \rightarrow \bar{p}\Lambda K^+ K^+$   We report the study of \OK \ and \SK \ using a $772 \times 10^6$ $B\bar{B}$
pair data sample recorded on the $\Upsilon({\rm 4S})$ resonance with the Belle
detector at KEKB. The following branching fractions are measured:
$\mathcal{B}$(\OKPHSP) $=$ $(4.22^{+0.45}_{-0.44}\pm 0.51)\times10^{-6}$,
$\mathcal{B}$(\SKPHSP) $=$ $(3.81^{+0.39}_{-0.37} \pm 0.45)\times 10^{-6}$,
$\mathcal{B}$(\ETACD+c.c.) $=$ $(2.91^{+0.37}_{-0.35}\pm 0.36)\times 10^{-3}$
and $\mathcal{B}$(\PLPHI) $=$ $(8.18 \pm 2.15 \pm 0.79)\times10^{-7}$, where
c.c. denotes the corresponding charge-conjugation process. The intermediate
resonance decays are excluded in the four-body decay measurements. We also
found evidences for $\mathcal{B}$(\ETACS+c.c.) $=$ $(3.59 \pm 1.52 \pm 0.47)
\times 10^{-3}$ and $\mathcal{B}$(\LLKO) $=$ $(2.30 \pm 0.65 \pm 0.25) \times
10^{-6}$. No significant signals are found for \JPSIS+c.c. and \LLKS \ ; we set
the 90\% confidence level upper limits on their decay branching fractions as $<
1.85\times10^{-3}$ and $< 2.14\times10^{-6}$, respectively.

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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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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: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio