Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse single spin asymmetries in inclusive deep-inelastic
  scattering   In inclusive deep-inelastic lepton-hadron scattering multi-photon exchange
between the leptonic and the hadronic part of the process causes single spin
asymmetries. The asymmetries exist for a polarized target as well as a
polarized incoming or outgoing lepton, if the polarization vector has a
component transverse with respect to the reaction plane. The spin dependent
parts of the single polarized cross sections are suppressed like $\alpha_{em}
m_{pol}/Q$ - where $m_{pol}$ denotes the mass of the polarized particle -
compared to the leading terms of the cross section for unpolarized or
double-polarized deep-inelastic scattering. Both the target and the beam spin
asymmetry are evaluated in the parton model. In the calculation only
quark-quark correlators are included. While this approximation turns out to be
justified for the lepton spin asymmetries, it is not sufficient for the target
asymmetry.

10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph