Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open heavy-flavour measurements in pp and Pb-Pb collisions with ALICE at
  the LHC   We present an overview of measurements related to open heavy-flavour
production with the ALICE experiment at the LHC. Studies are performed using
single leptons (electrons at mid-rapidity and muons at forward-rapidity) and D
mesons, which are reconstructed via their hadronic decay channels. The measured
differential production cross sections in proton-proton collisions at
$\sqrt{s}$ = 2.76 and 7 TeV are in agreement with perturbative QCD
calculations. Results from Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV on
the nuclear modification factor $R_{AA}$ are shown, along with the elliptic
flow $\nu_2$.

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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas