Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The (alpha_s)^3 approximation of Quantum Chromodynamics to the
  Ellis-Jaffe sum rule   We present the analytical calculation in perturbative Quantum Chromodynamics
of the (alpha_s)^3 contribution to the Ellis-Jaffe sum rule for the structure
function g1 of polarized deep inelastic lepton-nucleon scattering.

19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph