Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Next-to-Leading Order Radiative Parton Model Analysis of Polarized Deep
  Inelastic Scattering   A next-to-leading order QCD analysis of spin asymmetries and structure
functions in polarized deep inelastic lepton nucleon scattering is presented
within the framework of the radiative parton model. A consistent NLO
formulation of the $Q^2$-evolution of polarized parton distributions yields two
sets of plausible NLO spin dependent parton distributions in the conventional
$\overline{\rm{MS}}$ factorization scheme. They respect the fundamental
positivity constraints down to the low resolution scale
$Q^2=\mu^2_{NLO}=0.34\,{\rm{GeV}}^2$. The $Q^2$-dependence of the spin
asymmetries $A_1^{p,n,d}(x,Q^2)$ is similar to the leading-order (LO) one in
the range $1\le Q^2\le 20\,{\rm{GeV}}^2$ and is shown to be non-negligible for
$x$-values relevant for the analysis of the present data and possibly
forthcoming data at HERA.

20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph