Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heavy-flavour measurements in pp and Pb-Pb collisions with the ALICE
  experiment at the CERN LHC   The ALICE experiment at the CERN LHC has conducted first systematic studies
of heavy-flavour hadron production in pp collisions at sqrt(s) = 7 TeV and in
Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV. In pp collisions the differential
production cross sections of D mesons at mid-rapidity, as well as the cross
sections for electrons and muons from semileptonic heavy-flavour hadron decays
at mid- and forward-rapidity, respectively, have been measured. These data
provide a crucial testing ground for perturbative QCD calculations in the new
LHC energy regime. In Pb-Pb collisions, the nuclear modification factor
R_AA(p_t) has been measured for D mesons and for leptons from heavy-flavour
decays, indicating energy loss of heavy quarks in the partonic medium produced
in Pb-Pb collisions at the LHC. The strong interaction of charm quarks with
this medium might also generate a non-zero elliptic flow of D mesons as first
studies of the azimuthal anisotropy of D^0-meson production suggest.

7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph