Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heavy-flavour production in pp and Pb-Pb collisions at ALICE   In this contribution, recent ALICE measurements of the production cross
section of single electrons, single muons and open charmed mesons in
proton-proton collisions at sqrt(s) = 7 TeV are reported. The data are compared
to next-to-leading-order perturbative QCD calculations. First open charm
signals in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV are shown.

17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat