Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single Transverse Spin Asymmetries in Semi-inclusive Deep Inelastic
  Scattering in a Spin-1 Diquark Model   The observed results for the azimuthal single spin asymmetries (SSAs) of the
proton, measured in the semi-inclusive deep inelastic scattering (SIDIS), can
be explained by the final-state interaction (FSI) from the gluon exchange
between the outgoing quark and the target spectator system. SSAs require a
phase difference between two amplitudes coupling the target with opposite spins
to the same final state. We have used the model of light front wave functions
(LFWFs) consisting of a spin-$\frac{1}{2}$ system as a composite of a
spin-$\frac{1}{2}$ fermion and a spin-1 vector boson to estimate the SSAs. The
implications of such a model have been investigated in detail by considering
different coupling constants. The FSIs also produce a complex phase which can
be included in the LFWFs to calculate the Sivers and Boer-Mulders distribution
functions of the nucleon.

23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc