Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-loop QCD corrections to massless identical quark scattering   We present the two-loop virtual QCD corrections to the scattering of massless
identical quarks, q qbar to q qbar, in conventional dimensional regularisation
and using the MSbar scheme. The structure of the infrared divergences agrees
with that predicted by Catani while expressions for the finite remainder are
given for the q qbar to qbar q and the q q to q q (qbar qbar to qbar qbar)
scattering processes in terms of polylogarithms. The results presented here
form a vital part of the next-to-next-to-leading order contribution to
inclusive jet production in hadron colliders and will play a crucial role in
improving the theoretical prediction for jet cross sections in hadron-hadron
collisions.

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph