Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Threshold-improved predictions for charm production in deep-inelastic
  scattering   We have extended previous results on the threshold expansion of the gluon
coefficient function for the charm contribution to the deep-inelastic structure
function F_2 by deriving all threshold-enhanced contributions at the
next-to-next-to-leading order. The size of these corrections is briefly
illustrated, and a first step towards extending this improvement to more
differential charm-production cross sections is presented.

7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
2
The categories of this paper are: math