Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Relation Between Mechanisms for Single-Transverse-Spin
  Asymmetries   Recent studies have shown that two widely-used mechanisms for
single-transverse-spin asymmetries based on either twist-three contributions or
on transverse-momentum-dependent (Sivers) parton distributions become identical
in a kinematical regime of overlap. This was demonstrated for the so-called
soft-gluon-pole and hard-pole contributions to the asymmetry associated with a
particular quark-gluon correlation function in the nucleon. In this paper,
using semi-inclusive deep inelastic scattering as an example, we extend the
study to the contributions by soft-fermion poles and by another independent
twist-three correlation function. We find that these additional terms organize
themselves in such a way as to maintain the mutual consistency of the two
mechanisms for single-spin asymmetries.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph