Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of the Doubly Cabibbo-Suppressed Decay $D^+_s \to K^+ K^+
  \pi^-$   We report the first observation of the doubly Cabibbo-suppressed decay
$D^+_s\to K^+K^+\pi^-$ using 605 fb$^{-1}$ of data collected with the Belle
detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching ratio
with respect to its Cabibbo-favored counterpart $\mathcal{B}(D^+_s\to
K^+K^+\pi^-)$ / $\mathcal{B}(D^+_s\to K^+K^-\pi^+)$ is
(0.229$\pm0.028\pm$0.012)%, where the first uncertainty is statistical and the
second is systematic. We also report a significantly improved measurement of
the doubly Cabibbo-suppressed decay $D^+\to K^+\pi^+\pi^-$, with a branching
ratio $\mathcal{B}(D^+\to K^+\pi^+\pi^-)$ / $\mathcal{B}(D^+\to
K^-\pi^+\pi^+)$=(0.569$\pm0.018\pm$0.014)%.

21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat