Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarized parton distributions from NLO QCD analysis of world DIS and
  SIDIS data   The combined analysis of polarized DIS and SIDIS data is performed in NLO
QCD. The new parametrization on polarized PDFs is constructed. The
uncertainties on PDFs and their first moments are estimated applying the
modified Hessian method.
  The especial attention is paid to the impact of novel SIDIS data on the
polarized distributions of light sea and strange quarks. In particular, the
important question of polarized sea symmetry is studied in comparison with the
latest results on this subject.

31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess