Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermalization of quark-gluon matter with the elastic scattering of gqq,
  gqqbar and gqbarqbar   The elastic scattering of gqq, gqqbar and gqbarqbar and the thermalization of
quark-gluon matter are studied. According to Feynman diagrams at the tree
level, squared amplitudes for the elastic gqq scattering and the elastic gqqbar
scattering are derived in perturbative QCD. Transport equations including the
squared amplitudes for the elastic gqq, gqqbar and gqbarqbar scattering are
established. Corresponding to anisotropic gluon and quark distributions created
in central Au-Au collisions at RHIC, solutions of the transport equations show
that thermalization time of quark matter can be shortened by the elastic gqq,
gqqbar and gqbarqbar scattering.

6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci