Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinetic equilibration in heavy ion collisions: the role of elastic
  processes   We discuss the question of thermalization during the very early stages of a
high energy heavy ion collision. We review a recent study where we explicitely
showed that, contrarily to a widely used assumption, elastic collisions between
the produced partons are not sufficient to rapidly drive the system toward
local kinetic equilibrium. We then briefly discuss recent developments
concerning the description of kinetic equilibration and comment on some open
issues related to phenomenology.

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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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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: math-ph
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The categories of this paper are: chem-ph