Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Observation of the Decay $B^{\pm} \to \pi^{\pm}\pi^{0}$, Study of
  $B^{\pm} \to K^{\pm}\pi^{0}$, and Search for $B^{0} \to \pi^{0}\pi^{0}$
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas