Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modelling the nucleon structure   We review the status of our understanding of nucleon structure based on the
modelling of different kinds of parton distributions. We use the concept of
generalized transverse momentum dependent parton distributions and Wigner
distributions, which combine the features of transverse-momentum dependent
parton distributions and generalized parton distributions. We revisit various
quark models which account for different aspects of these parton distributions.
We then identify applications of these distributions to gain a simple
interpretation of key properties of the quark and gluon dynamics in the
nucleon.

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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: stat