Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-jet cross section in hadron collisions at next-to-leading order:
  pure gluon processes   The next-to-leading order three-jet cross section in hadron collisions is
calculated in the simplified case when the matrix elements of all QCD
subprocesses are approximated by the pure gluon matrix element. The
longitudinally-invariant $k_\perp$ jet-clustering algorithm is used. The
important property of reduced renormalization and factorization scale
dependence of the next-to-leading order physical cross section as compared to
the Born cross section is demonstrated.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys