Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Alternative Approach to Semi-inclusive DIS and A Model Independent
  Determination of D_u^{\pi^+}, D_d^{\pi^+} and D_s^{\pi^+}   We discuss how to extract the polarized parton densities and fragmentation
functions in a model independent way from SIDIS, and present results for
D_{u,d,s}^{\pi^+}.

14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph