Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forward Jet and Particle Production at HERA   Single particles and jets in deeply inelastic scattering at low x are
measured with the H1 detector in the region away from the current jet and
towards the proton remnant, known as the forward region. Hadronic final state
measurements in this region are expected to be particularly sensitive to QCD
evolution effects. Jet cross-sections are presented as a function of Bjorken-x
for forward jets produced with a polar angle to the proton direction, theta, in
the range 7 < theta < 20 degrees. Azimuthal correlations are studied between
the forward jet and the scattered lepton. Charged and neutral single particle
production in the forward region are measured as a function of Bjorken-x, in
the range 5 < theta < 25 degrees, for particle transverse momenta larger than 1
GeV. QCD based Monte Carlo predictions and analytical calculations based on
BFKL, CCFM and DGLAP evolution are compared to the data. Predictions based on
the DGLAP approach fail to describe the data, except for those which allow for
a resolved photon contribution.

9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph