Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Cross Section for $e^{+}e^{-}\to$ hadrons at Energies
  from 2.2324 to 3.6710 GeV   Based on electron-positron collision data collected with the BESIII detector
operating at the Beijing Electron Positron Collider II storage rings, the value
of $R\equiv\sigma(e^{+}e^{-}\to$hadrons)/$\sigma(e^{+}e^{-}\to\mu^{+}\mu^{-})$
is measured at 14 center-of-mass energies from 2.2324 to 3.6710 GeV. The
resulting uncertainties are less than $3.0\%$, and are dominated by systematic
uncertainties.

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The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
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The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci