Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged-particle multiplicity and transverse energy in Pb-Pb collisions
  at sqrt(snn) = 2.76 TeV with ALICE   The measurements of charged-particle multiplicity and transverse energy at
mid-rapidity in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV are reported as a
function of centrality. The fraction of the inelastic cross section recorded by
the ALICE detector is estimated using a Glauber model. The results scaled by
the number of participating nucleons are compared with pp collisions at the
same collision energy, to similar results obtained at significantly lower
energies, and with models based on different mechanisms for particle production
in nuclear collisions.

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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn