Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Azimuthal angular correlations between heavy-flavour decay electrons and
  charged hadrons in pp collisions at $\sqrt{s} = 2.76$ TeV in ALICE   In ultra-relativistic heavy-ion collisions heavy quarks (charm and beauty)
are produced in hard scattering processes and thus carry relevant information
on the properties of the created hot and dense medium. Heavy-flavour hadrons
can be measured using electrons from their semileptonic decay channels. The
relative contribution of charm and beauty hadrons can be estimated from the
study of the near side azimuthal angular correlations between these electrons
and charged hadrons.
  We present the measurement of azimuthal angular correlations between
electrons and charged hadrons in pp collisions at 2.76 TeV measured with ALICE
at the LHC. Electrons are identified using the Electromagnetic Calorimeter and
the Time Projection Chamber and the charged hadrons are identified using the
Time Projection Chamber. The azimuthal angular correlation distributions from
PYTHIA simulations are used to extract the relative contribution from B-hadron
decays to the yield of electrons from heavy-flavour decays up to $p_\textrm{t}$
= 10 GeV/c.

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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin