Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of multiplicity and momentum spectra in the current and
  target regions of the Breit frame in Deep Inelastic Scattering at HERA   Charged particle production in neutral current deep inelastic scattering
(DIS) has been studied using the ZEUS detector.The evolution of the mean
multiplicities, scaled momenta and transverse momenta in $Q^2$ and $x$ for $ 10
< Q^2 < 5120 GeV^2$ and $x > 6\times 10^{-4}$ has been investigated in the
current and target fragmentation regions of the Breit frame. Distributions in
the target region, using HERA data for the first time, are compared to
distributions in the current region. Predictions based on MLLA and LPHD are
inconsistent with the data.

18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th