Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transversity Distribution Functions in the Valon Model   By using the valon model, we calculate the Transverse Momentum Distribution
functions, TMDs, inside the Nucleon. TMDs indicate the probability to find
partons with spin aligned (anti- aligned) to the transversely polarized
nucleon. The results are in good agreements with all available experimental
data and also global fits.

13
The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol