Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-Mass Dielectron Production in pp, p-Pb and Pb-Pb Collisions with
  ALICE   The ALICE Collaboration measures the production of low-mass dielectrons in
pp, p-Pb and Pb-Pb collisions at the LHC. The main detectors used in the
analyses are the Inner Tracking System, Time Projection Chamber and
Time-Of-Flight detector, all located at mid-rapidity. The dielectron yield in
p-Pb collisions shows an overall agreement with the hadronic cocktail. The pair
transverse momentum distributions are sensitive to the contributions from open
heavy-flavours. In Pb-Pb collisions, uncorrected background-subtracted yields
have been extracted in two centrality classes. In pp collisions the production
of virtual photons relative to the inclusive yield is determined by analyzing
the dielectron excess with respect to the expected hadronic sources. The direct
photon cross section is then calculated and found to be in agreement with NLO
pQCD calculations. A feasibility study for LHC Run 3 after the ALICE upgrade
indicates the possibility for a future measurement of the early effective
temperature.

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The categories of this paper are: econ
26
The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
2
The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin