Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Point-by-point extraction of parton distribution functions from SIDIS
  single transverse-spin asymmetries   We show how some parton distribution functions related to the transverse spin
of nucleons can be extracted point by point from combinations of proton and
deuteron observables. In particular, we present a determination of the valence
and sea Sivers functions from the single-spin asymmetries measured by COMPASS.

12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg